Vortex Sound Research

I've been researching my first poly-synth purchase. And between the Hydrasynth, Polybrute, and Summit, I'm leaning more towards the summit. I'm really interested in the 16-voice polyphony, bitimbral voices, and the amazing lush sounds that I've heard through demos and videos. I'll be able to demo a unit in the next few weeks, and if all goes well, I plan to take the plunge.

I'm curious from anyone who's owned the Summit, if they're any regrets that you felt could have been mitigated from a different polysynth?