You can make very expressive patches with the Mopho Keyboard, freely assigning parameters to controllers, modulators etc. There’s an expression pedal input that accepts CV (Analog Four CV track? I have yet to do this), and an envelope follower on the audio input.

If you want to play it’s hard to match the MK - I’d take it over any of the old mono classics I can think of at the moment.

Basstation 2 seems very nice too though. Its interface is perhaps a little bit more immediate. If you prefer its tone and the mod routings fit you, I don’t think you could go wrong with that one either.