My pick would be a Yamaha Motif ES with PLG-150 An1x plugin board. Best strings and horns and the VA synth plugin board is just superb. Can't go wrong there.

I'd also recommend a Kurzweil but to be honest my experience with their reliability and service prevents me from doing so. Could be just my bad experience.

Anyway, try before you buy. You never know. YOu might like a Fantom or a fantom or some cheesy old Triton instead.