haven't been reading all of the replies here, BUT, I'd give a thumbs up on the SH201.  It's a real synth, that's infinitely tweakable.  I think it uses analog modelling, which isn't as cool as having a true analog synth, but really how hard is it to digitally create good sine, square, saw, and tri waves?  I think the synth sounds HUGE if you make it.  If you're looking for a real synth and not a sound module, I think this would be an excellent choice.  I also own a Roland Juno106, Juno 60, and Jupiter 6 so I've got a good handle on Roland's classic synth sounds.