After trying all current offerings from the Roland XP/JV series, the Korg Triton/Trinity and Yamaha's EX series I chose the Kurzweil K2VX. The sounds are all top notch. People often rag on the 24 note poly and the effects processor, even one individual went as far as to say that you can't make a professional recording with this because of the noise in F/X processor. YOU CAN! First the F/X aren't that bad, and if you don't want to use them, the K2VX allows to to bypass them via seperate outs. Sure, the K2500 series offers more flexibilty in this region, but in terms of slightly more affordability, you can use this board, and in some cases, it's F/X for pro-recordings.
The 24-voice poly isn't very limiting. I have run into cases where I ran out of poly until I did some editing of sounds and I was able to work around those limitations rather easily. The demo sequences on the Kurzweil Power Tools CD show off the full capabilities of dense Orchestral Movie Score arrangements and include patches that show how some creative programming can get around most anythig on this board.
The sounds are very amazing for most styles of music. Jazz/Pop composers/musicians will not be dissappointed with this board. Dance/Alternative/Electro people might need to do a little bit of programming to get what they need, but I think many will find what they need already there or on the numerous librarys you can download of the Internet.
The only downside is that this board and the entire Kurzweil series is a little pricey. But for anyone serious about recording and even live performance, check out this board.