owned one for a year or two. sounds great. really nice synth. can be HUGE sounding or nice and weedy. nice pads and drones and basses. it's sort of jupiter 6 meets jupiter 8 but then again it's its own thing. i always liked that it had XLR outputs. the output was always nice and hot. no DI needed.
the mpg-80 is a mixed blessing. sometimes it seemed to hinder me as the faders have a short throw and it was sometimes difficult to get where i needed to go when i just needed to make a small adjustment.. so i ended up using the front panel more than i would have liked. the motu unisyn editor is pretty good for it though.. good enough.
i ended up selling it to may for modules for my modcan.
i wouldn't mind having a jupiter of some kind though. probably a jupiter 6 w/europa midi upgrade from synthcom
http://www.synthcom.com/