Dare I say you need all three?
I started out on a Micromoog, with a dream to have a nos System 15 built from a now defunct company. I purchased a RIngmod to cover the tremelo duties on a Rhodes in need of repair. I got a 921a Osc driver and JUST as I was about to get the 921b and a power supply, I got a medical bill, so I had to settle for the Freqbox and Cp251.
I yearned for a Voyager, but I also yearned for a modular. I had to find a medium. I had to get the most synth for the least amount of money, and as the system 15 was 14K, it was much easier to just go the Voyager route, and let the micro move into semi-retirement.
Then I got my Voyager select and vx351 for 2999 and it was that price that did it for me. I pounced.

This is what I’m working with now. I hate to say this, but if I would have had both side-by-side to choose from, I might have well chosen the dotcom. I purchased the Voyager intending it to be a supplement to the 15 and to replace the micro.
Here is the conclusion that I came up with.
The Moog Delay is absolute. I could do with a few more.
The phaser is a keeper no matter what.
I like the Freqbox and the Ringmod, but I wish they were in MU format.
I didn’t really need the LPF, but I got it to have the fooger modular which still required me to purchase envgens and vcas.
The Cp251 is a must.
Really, as far as my system goes, the space that the foogers take up and the money spent on them could have gone to better use with their module counterparts. I do not regret buying them though. They have brought me much joy.
Heres one final thought:
When you have a synth like the Voyager, it spoils you because there is a knob-per-function interface. It is hard to approach a synth that doesn’t have that after messing with the Voyager. When you go modular though, theres damn near a CV input jack for every function, and it’s hard to go back to the Voyager knowing that there are certain things you just can’t connect a patch cord to.
If you yearn for a modular, you will always yearn for it. A Voyager won’t satisfy the urge to amass a wall of sound. But I’d tell anyone who has even the option to buy a Voyager that they will be pleased. You will spend years building the modular anyway. Hell, just get yourself a Voyager, a dotcom rack frame, and the desktop power supply and some filters and expand from there.