Not that I'm considering buying the second synth yet... I won't, but I'm thinking about what to get next, to accompany the REV2... I bet I'll want some digital oscillators providing some extra synthesis features to complement the REV2... Wavetables and FM in particular.
The Prophet 12 is an obvious candidate, but I've had this synth before, and must admit that I found it's digital character a bit flat and harsh, especially when using audio rate modulation. Not that you cannot create good sounds with it, but I'd like some better and faster processed oscillators, and as far as I recall, the P12 did audio rate modulation at about 11KHz.
I think I might go for the Novation PEAK instead... 24 megahertz in frequency regarding the oscillators running on it's FPGA processor... The wavetables sound more interesting having 5 waveforms per table, and the update speed of envelopes and LFO's goes up to 1.6Khz, plus audio rate modulations are in the speed of the FPGA... The oscillators just simply sound much better in my opinion, and the FM and other audio rate modulation does not have this same harshness... then it has got a state variable filter which I miss on the P12, and a lot more distortion options.
On top of that, the build in reverb is gorgeous, and the two other delays are cool as well... all in all it just seems like a sonically better choice right now.
There are a few negatives though... 4 voices less, but that's not so bad... but the dual timbrallity is probably the biggest negative... it does not have the ability to layer two sounds at once which would be nice for more complex pads/drones etc... but I could do these things with the REV2, and even layer the REV2 with the PEAK for this if needed.
So all in all, I think I'll end up with the PEAK when the time comes... it also places itself nicely behind the REV2 in a metal stand so it's easy to reach both...
After this, I'll only be missing sample oscillators... that will be the last and third synth I'll get...