Hi Steve,
I agree with you: $140 is a great price.
I've never used the midi function but I'm sure there are many folks on this site who could help you with that. When I record; I go from "left out" of the RP-2000 to the audio in of my mac. All you need for that is a cord with a
1/8" plug on one end and a 1/4" plug on the other. You can pick one up at Radio shack (probably any electronics store) for a few dollars.