Hallo danieln,
What is your budget? And your room size?
The Yamaha Clavinova CLP models are good and quite a few in this Forum use this.
For a cheaper digital piano suggest you look into the
Yamaha YDP131C Digital Piano w/ 88 Keys, Graded Hammer Note weighted action with realistic piano feel, 3 pedals, 2 headphones, with seat - NEW $1,028 (amazon.com) and perhaps at lesser prices elsewhere (search under Froogle)
This is constructed like a genuine piano, not just a keyboard on a stand.
Is 4 ft 8 inches length and 17 inches depth - do you think can be accommodated in your room?
Best of luck!
Prof K S (Mohan) Narayanan
Musicologist, Composer, Teacher
Chennai (Madras), India