I played a VOGEL before. Nice tone, a bit on the bright side sound-wise, big sound.
Other possibilities I can think of (assuming new pianos for your price range, some may exceed the $20k mark a little with the 2004 price hike and such):
Yamaha C3
Kawai RX-2, RX-3, possibly RX-5
Petrof V, IV, may be III as well
Estonia 5'6" and may be 6'3"
Wilh. Steinberg (IQ77 ?)
Samick World, Knabe, Weber
Young Chang, Pramberger