I think the Mini Brute is also one to consider: specially because of it's flexible multi-mode filter. Still a rare thing on this simple Mono Analogues, to have a resonant (self-oscillating) high-pass filter, like the Korg and the Brute. Still waiting to see how this lader filter (acid filter) will sound on the Novation. They used to sound very good for teebee sounds, the original, for those of you into acid stuff.
This thing being Novation, and if the first Bass Station is a good indication to have in mind, will be priced fairly cheap and sound very good. Interface looks decent!
EDIT
I didn't even consider the Waldorf, since this is like a myth synth. No one's ever heard it!