Lets see $600-$850 in the U.S.---I'd say in that price range and what you're wanting to do there really isn't anything you can buy new to fit that price range. There's the new Roland GW-7. Has great sounds, decent interface ect. However it doesn't have speakers, and has limited features with recording. If you can push it up to at east $1000 U.S. I'd suggest a Korg PA-50 or a Yamaha PSR-1500.

Squeak