I’ve had my LP stage II for a number of years now and as much as I love the sound I can’t get with the lack of knobs. I’ve tried and tried it just has not happened. It’s not for lack of trying or wanting to get it, it just hasn’t worked. I’m I alone? I find myself playing my SEM PP for hours on end. Even my Minitaur sees more use. So i’m leaning towards selling my LP and picking up a Voyager. I know I’ll miss the arp that’s my favorite bit on the phatty. Has anyone regretted such a move? I think if I was a keyboard player it might be a different story, a smallish instrument with a great sound equals perfect for giging. But I’m just a knob twiddler. You know the next line of questions from me is going to be the debate of a used Old School or Standard Voyager. And I’m really torn on that one.
I married my LP one year ago and have not had a heavy use of it. Still I must say, as a keyboard player AND a knob tweaker, that I found its interface well thought. I remember when it came out, I was like are you kidding 4 knobs?? but when I happened to casually try one in a shop, I got it a few months ago as a good opportunity showed up.
However…
…there is no one to blame: the relationship you have with an instrument interface is very personal. You’ve been trying, you can move on, it’s for better, right? Plus getting back to the LP whenever you think you are ready to is ok.
I don’t think me and my LP could ever get married. At best, friends with benefits. 
Never looked back, no disrespect to the phatty as it is a grat synth! the arp is a missed feature and the overdrive is nice, but the voyager is another beast altogether, it is the best mono I have ever owned or used, it oozes quality and sounds amazing, I don’t think you will regret selling it for a voyager, I did not, but that is my 2c
If you are more of a tweaker the touch pad on the voyager is a treat! assigned to filter spacing, cut off and resonance you can get some truly amazing sounds (you can map it to pretty much any parameter) & if you ever decide to get a vx-351 & a cp251 down the track, the touch pad shines as a bossy cv controller I love mine!
I will get a VX-351 as soon as I get the Voyager. I already have a CP-251 and use it all the time. The touch pad is the only reason I’d get anything other then an Old School. Well, that and I’m a sucker for the looks of the Electric Blue I do like my perdy lights. The overdrive is also a very cool feature I’ll miss, but I’m sure I wont miss it that much once I get my paws on all those knobs. The arp is a different story.
I’d have to have both a Voyager and a Phatty, just for the unique sounds each one makes. A Voyager cannot replicate Phatty patches exactly. Likewise, the Phatty can’t replicate all the Voyager sonic possibilities. I don’t have a Voyager, but if I did, I wouldn’t have sold my LP to buy it. Just my take on it.
I sold my Phatty so I could buy a Voyager, and while I do miss my Phatty, I do not regret my decision. Voltor is right though: the two cannot replicate each other. They are vastly different instruments. You need to find out which one better suits you. Spend some time playing a Voyager and/or if you don’t have access to one, do your research. Listen to demos. Read the specs. Talk to Voyager owners (this is a good place to do that). Don’t make any hasty decisions.
One thing I want to add: the Voyager is capable of the old Minimoog trick of feeding the audio output back into the input. This creates an “overload” that is similar to the Phatty’s “overload” function. Yeah, it’s handy to have a button, but more cables looks cool. 
I miss preset 4 maybe 8? (I think) off my ARE edition, lamb something??? womp womp, such a cool bass drop sound!
Somebody said it’s more about ‘you’ than it is the instrument. It’s a very personal thing.
I have a number of go-to patches on my Phatty that I know cannot be replicated on my Old School. And something about that slightly smaller keyboard; it doesn’t have aftertouch and it’s not as high quality but I’m more nimble on it than I can be on the Voyager keyboard.
If it’s a choice of one, I cannot argue that a Voyager is the correct choice especially if you get the VX-351. The versatility is beyond belief and description. Yeah you won’t be able to nail the exact patch that you might have fallen in love with on your Phatty, but you’ll come up with other patches. One thing that you will miss (possibly) is the way that the light-rings on the Phatty reflect the position of the recently pulled up patch. If you play live and look to switch patches mid-song then tweek, you’ll need to plan ahead.
But my general advice, provided that you are not independently wealthy is to buy used. You’ll NEVER get what you paid for on most of the current Moog gear, I’ve seen LPs go for $800 or folks that pimp out an LP not even get that; same for Voyagers, an Old School (that at one point people thought were in high demand and limited supply) recently went for something like $1650 and a Performer for $2250. But this means there are bargains out there if you are patient.
I started on the Micro, then went to Voyager. The Phatty was just substandard for my needs (not soundwise but in terms of construction quality, keyboard range and pots).
I really felt how the knob-per-function interface spoiled me when I first sat on a Fanton G8 in a music store and wanted to control the filter resonance on a synth setting and there was no pot for it.
Taking your plight a step forward, I find that since I have begun expanding my modular system, even the Voyager leaves something to be desired. I will never regret buying it, but not having CV control over various aspects really makes a difference for me. The Voyager has knobs galore but when you get used to routing almost anything anywhere, you find yourself wishing for that amount of flexibility all the time. The Voyager can really benefit from extended pot mapping destinations like the mod amount or the amount to filter, etc for more complicated modulation patterns. I don’t know why they aren’t adding an arpeggiator.
I chose the Performer/Select editions because I had sworn that my days of meticulous patch documentation were over, then went modular.
Edit: Oh, I think that programming the Phatty to be a consenting party exceeds the limits of it’s hardware.
One thing I love about the Voyager is the ability to disable keyboard control over osc 3. It sounds useless, and before I tried it I thought it would be one of those things that I just don’t use, but in practice I have found infinite use for it. It really adds a whole new branch of possibilities, including the ability to make the Voyager sound duophonic.
Lambsbread? The lowest of the low! One of my faves as well, especially the low C. It took me a while to find a 12" speaker that would react to low C on the Lambsbread preset.
Thanks to all for the reply. I think i’ll save a little money and then sell my LP. I have cv mod, sonic tune up,tracks 1v per oct, black end caps and blue lights all around. So I’m hoping I can get a fair amount back. I know I’ll use the Voyager a lot more.
I would almost guarantee that you should be able to get $1200 for it, but don’t settle for less than $1000 for sure.