I like having the Sub Phatty on my desk in front my monitor but think it would be more ideal to have it sitting near my Oxygen 61 controller.
I have my eye on a couple of 2 tier stands:
This 1 from Thomann - 2 Tier Stand
Or this 1 from Amazon - 2 Tier Stand
I like the look of the one from Thomann but I’m not sure if the 25 key Sub Phatty would sit well on those supports.
I’ve been looking for something too. I have a two tier On-Stage stand already and am considering another one. The width is adjustable down to 21 inches but that could be cutting it close with the Sub Phatty being 21.5. Maybe using a board across the tier would help.
http://www.sweetwater.com/store/detail/ZStd2Tier/
Also considering this one. The bottom tier is not adjustable but the top is.
http://www.musiciansfriend.com/accessories/quik-lok-z-726-keyboard-stand
I’m also looking at the Apex which is similar to the Thomann. I think it might be good with the keyboad pushed all the way up against the back support but wonder if its back to far to be comfortable playing.
^^ what he said
Definitely get an H style stand. I have two of this style, one has a rigged up 3rd tier.
They are:
At one pint, I had a Novation SL Mk 2 25 key on the top of mine and as mentioned above, had to use a ‘board’ beneath. I screwed another piece of wood against the face of the long edge at right angle as to serve for a ‘stop’ for foggers; that might be a good choice for you; can use the space for a drum machine or whatever other gear you might have.
Thanks for the input, it’s much appreciated 
The Quik-Lok Z-726 looks the part but the bottom tier seems to be extra wide & geared more towards 88 keys. Most of the H style 2 tier stands seem to be pretty expensive (well at least they are in the UK) so I think I might take a chance on the Column style 1 from Thomann. I’ll get back to y’all & let you know how it works out.
I have an On Stage Platform stand as a one-tier only~ bought specifically for Voyager XL with Taurus underneath as EM White suggested:
http://www.sweetwater.com/store/detail/PlatformStd/
the 2nd tier option looks kind of dodgy to me for a very heavy keyboard on top but the SubPhatty is a relatively light keyboard
i also have one of these: http://www.long-mcquade.com/products/2682/ a Hercules “Z” Style is a much heavier build but even so I’m always a bit nervous with even the smaller Electric Blue Voyager on top
The Hercules can be set to a narrower width, but using a board you could put a sequencer, beat box, cp251, moogerfooger etc etc next to it