Being an avid Korg user, if you're just looking mostly for sounds and 88 keys, you should check out the new Triton TR 88. Loads of killer sounds, programability, and within your price range.

Also, for anyone interested in a heavy-duty, flight case-type case, I would recommend keyboardcases.com

They made me a custom case for my PA1X pro, it was made before the deadline I gave them for my first raod gig with it and the case fit my keyboard like a glove. Good construction, built in wheels and handles on three sides. check 'em out.

Jeff