All I can think of is...
Roland JV90, Korg 01/W Pro, Alesis QS series (Good controllers, nice sounds, especially strings and organs).
THat's about it.
Oh,check out Roland A series. They are hard to find though and some of them are controllers only, NO sounds.
You might also try to track down some of the older Korg stuff like M1 and T1/T3 (if you'll be able to find the pro version). They won't sound great, but would make very nice controllers.

If all fails check out some Technics boards. I've got the SxWSA-1. It sounds cool and makes a great controller. I think Tecnics stuff might be the way to go.

-ED-