DUde, I bought an RM1x about a week ago. Usually I do a ton of homework on equipment before I purchase it but this was the exception to the rule. I basically played with the demo in the store for an hour and after hearing 'hybrid' versions of Fatboy Slims 'Everybody needs a 303', Prodigys "Breathe" and Chemical Bros "Setting Sun" that Yamaha programed into it I just couldn;t leave the store without it.
I got home, and the fear set in that I'd potentially just blown $700 in something that might be a piece of toss. After a week though I can categorically say that I haven't been this excited about a piece of hardware since my first guitar distorion pedal all those years ago. WHile the Cs2x may have greater sound capeabilities, to me....and this sounds pretty vacuous I know, it comes down to whether you like using a machine that looks and plays like it was designed as mpart of a DJ\Remix setup or a machine that looks and feels like it would be at home in a member of Kraftworks house.
In all it's just a hell of a lot of a fun machine with beautifully rich sound capeabilities, and if you synch it up with a 505...well....leaving the house can be difficult.