The best digital pianos are actually VSTs, Ivory, Pianoteq, NI allicia keys and some others come to mind... They are a few hundred dollars each...

The best piano keyboard available is currently Kawaii VPC 1 which is about €1200, it comes withouth sounds, but with 3 dedicated pedals.

Best thing, its flat, and you can put anything on top of that for home use... For example an audia 4, a laptop with touchscreen and NI machine...

Sadly it has no aftertouch or pitchbend controllers, but for simply playing piano, thats unnecessary... Because with just a little laptop and ome of those VSTs running on it you have the best digital piano action and sound for less then €2000



Just watch this video if you want to know why, its by pianoman chuck

http://youtu.be/fEVbwCtnygY