Mac OS 10.6.8 - Instant Orchestra (lastest 2108)

The Instant Orchestra Demo video uses a CME U-Key 49. I just bought Instant Orchestra to use with Digital Performer 7 in my recording studio. I'm an audio 

engineer & drummer with some piano skills. The CME U-key in the demo has been discontinued and I'd like to get something comparable with few drum pads and a fairly easy learning curve. Any suggestions on alternative keyboards (under $300) 

Thanks!

Lanny Grilly

grillybrothers studio