Yamaha some nice 88-key digital pianos under $1000 including the Arius YDP135R (left pic) at $999 internet price (incl bench), a portable model called the P95 ($499 internet price - lower left), and the new Yamaha P105...go here for my review on that model: Yamaha P105 Review. The YDP135R and P95 digital technology has been out for a few years and they are essentially the same pianos with the same touch key action (GHS basic keyboard action), same sampling technology (6 basic instrument sounds on the YDP135R & YDP141 and 10 instrument sounds on the P95), 64-note polyphony, 12 watt speaker system/audio power, and other features incl reverb, layering, etc. The P95 can also be connected to a specially made Yamaha piano stand and 3-pedal system (for $175 more) that makes it operate and look more like a cabinet piano. The P95 also comes in two colors, black & silver for the same price.
Casio PX750 Review
Casio PX850 Review