I would probably go with 1000 because I have a software of choice and I'm done learning new software. Or wait until the price of the MPCRen drop a few hundred (if the audio interface is great).
mpc studio is more like "If you computer aint tight, then the beat aint right" and mpc 1000 more like "if you drums aint tight then the beat aint tight" like someone posted in this forums already :d