If you had a CS1X I'd say go for it without doubt. The CS2x is a keepable synth tho, not one I'd like to have to get rid of, however if you sat in front of the SH-201 and you like it better and the only way to get it is to sell the CS2x then I'd say go for it. Forget about a JP-8000, the CS2x may be Rom based and the JP-8000 a VA but they seem to cover a lot of similar sounding ground in my book. Only reason to upgrade to a JP-8000 from a CS2X if you must is perhaps for the more durable build quality. I've said it before and I'll say it again, the CS2X is a very underated and unapreciated synth in my book. Its worth more than people are willing to pay for one, and does have some unique features and sounds not all on any other one synth, so for me at least I feel better off keeping it and saving up the little more I'd get for it to put toward anything else I might want. I'd not fault anyone for doing the same or difrent though, but I think I'd personally regret selling mine so I could get an SH-201 instead. Might not be a dumb move though if that was all I had and I really liked the SH-201. If you miss it, you'll probably be able to get another again later.
[....<OII>.....soundcloud player v2.42.....................link