I just bought a Tetra used to make my Prophet 08 a 12 voices synth, I think I will have enough with 6 voices per layer in a split/Stack program...I haven't scratched all the possibility of my P08, so, I don't think I will be buying a REV2 but if I will have to, for sure, it will be the module, I have a P08 and a P12 that have good synth keybed, so, I'm in the same league, no more Keys for me, just modules...