I agree with what's been said. Even if you are looking "only" for something basic, make sure you really like what you decide to get. The Yamaha P series overall has a very good action and reasonable sound. You may or may not like its action, so compare. The best option, IMO, is to get a stage piano and connect it to a computer (I assume you already have a computer). The sound you get from such an arrangement beats any built-in sounds, except, perhaps, those in the Post Piano. You may have to shell out some more money to get the ultimate Steinway or Bösendorfer sound, but even basic samples are more authentic than built-in samples (the reason is lack of memory in electronic pianos). The only thing I find really annoying in "basic" pianos is the lack of authentic pedaling capabilities. It's either "on" or "off". But that's my only gripe.
Please check out the other threads on digital pianos. Everything that is relevant to your situation has been said many times, so you will find more usuful information in those threads.