Since nobody seems to use Roland's Mix Performer with Sonar, I changed my thread question to be a bit more universal, since I still haven't come to a decision what to get.
At minimum, I need some kind of USB keyboard. I'd like something to control basic DAW functions, but more important to me is a high quality keyboard with aftertouch.
The Blofeld is tempting with its sounds, and the well reviewed keyboard, even though it lacks for DAW control, other than triggering my soft synths...
Maybe there's some small device I get get as a DAW controller, separate from the keyboard?