I got an A-90 for $1000 used at GC. It even has the expansion sounds.
I'm a pianist and own a Yamaha C3 Grand. I also play a P200 at our church. While no electric piano comes close to a real grand as far as feel and sound, I do like the feel of the A-90 and would say it's as good or better than the P200. If you could find a used one, you'd have enough left for more gear.
As a live controller it is virtually unrivaled, with all it's control over external midi devices.