Yeah don't buy it new...
The CS1X is a great "first synth".. It is not really a synthesizer (the basis of its architecture is made of short samples, like most) but it is a great MIDI controller, and its sounds are good.
Buy it second hand, it is really dirty cheap, and you will experience REAL SEQUENCING if you hook it to Cubase VST, for example. It is not hte best keyboard of the world, but for the price it's the best.
Have fun with it. I think it's a great choice, some of the best value on the market (price/quality).