The R MC307, is that the "Chinese" version?
Anyway, Ghostly. The old Roland MC303 is so incredibly popular because of one thing: Personality.
One thing about it is that, when water get's condensed inside it, the filter resonanse can totally freak out.
Have you ever heard Josh Wink's "Higher State Of Conciousness" and wondered how the hell he make the bass scream in such a cool way. That's the answer. Water condensation.
This is one of the few "Personal" things I somehow like about it. Its weaknesses is its strength.
Also the "filter" of the MC303 and 505 is so cool. It have so many facettes and can create so many cool sounds. It is ideal for trance-dj's. It is more alive than other bass stations.
The difference between 303 and 505 is that the 505 has a mixer section so that it is easyer to control the volumes. Before, volumes were a part of each section. The 505 SENDS MIDI data, not only recieving i. The 505 also covers 5 octaves for some seriously deep bass. It still only have 1 drumset, but it is a VERY nice sounding drumset, not like the Korg Rythmstation.
If you are a hip-hop Dj you probably don't want to use it. You'd want a phatter sound with less filter and another way of creating patterns.
Sincerely Dj Chriss
http://www.mp3.com/ChrissT