Edirol USB MIDI adapter should work fine with any keyboard.

Velocity sensitive is easy, it's the polyphonic aftertouch that gets ya!
I hate recommending controllers; one persons feel is not right for someone else. For that matter an old Alesis QS6 can have the right feel, but do you need other features? ..or just looking for feel and note info (including aftertouch and velocity) ?
Do you need any sounds from it?

I do not work here, but the benefits are still awesome
Make your sound your own!