Hi Evan,
The JP8000 is pretty cool and would be able to create the type of sound you are interested in.
I haven't spent much time with the MS2000 so I can't really help you out there. Personally I would lean toward the JP8000 though. I didn't bring this model up since you said that your funds are limited but if you could find a JP8000 for $400.00 or so, I would say go for it.

Best Regards,
Dave
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Wm. David McMahan
Nat'l Product and Support Manager
Generalmusic USA
GEM Community Forums