Here is a link to the very inexpensive drum kits offering from M-Audio -- which I am using, along with their "Key Rig", to learn how to use all this stuff. I run them through Forte, and in conjunction with BIAB and OMB. Both of which I am trying to master as I move from arranger to software.
Watch video -- it's interesting. There is one MP3 down screen.
http://tinyurl.com/v58ua