You need at least a sampler, and what about the cs2x synth? It's a matter of taste, but the sounds in the roland's are too "clean" (no offence!) I'm using a cs1x and I made a lot of remixes with it, some of them are for sale on CD's, and it's a good synth if you want to start, all the sounds can be edited insantly, that's why I bought the yamaha cs1x over the roland synths...