I got the Novation SL MK2 25 keys. I Use the Automap software that works well with Software synths. It is also possible to use as a "normal" midi keyboard.
Well built, and nice keys, even though its not like a piano;)
http://www.musicradar.com/reviews/tech/novation-25-sl-mk-ii-207418/ There are 25, 49, and 61 key models..