Sorry, Matt, I can't really help you.
I do only know some older synths. You know I have a K2000 and I'm really happy with its beautiful sounds (sometimes they are really galactic ). But 24 voices of polyphony is way too less. I know that the newer K2k boards have 48 voices and that's a bit better.
The filters of the Kurz are phenomenal and if you add a sampler into it you'll have a starship. You don't really need tons of ROM samples but you need a couple of really good sounds...
I don't know much about the key feel because I'm not playing keys very often. But the Kurz's K2000 series did support release velocity too - not only attack velocity...

But every synth has its own charme...
Good luck for your decision, my friend!

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Greetings from Frankfurt (Germany),
Sheriff ;-)

[This message has been edited by Sheriff (edited 06-12-2005).]