While the MS2000 is an AWESOME synth (I just got one) It's not one I'd reccomend as someone's only synth as it has only a four voice polyphony. I'd reccomend something with a higher polyphony. A good website to check out is http://www.vintagesynth.com/

It's got a LOT of info on a lot of synths, new and old, plus sound samples of most of them. It's a good resource. Synthzone.com (of course) is also a decent resource.