Also for parts and service down the road, I tell people to stick with Yamaha, Roland and Korg for < $1200 instruments. You're not likely to find a Kurzweil or Nord used in that price range. Casio's play pretty well, but they've only been making decent weighted key (hammer action) digitals for a few years.

Lots of info at that subreddit FAQ. Also this, about how Yamaha makes lots of models with Graded Hammer Action

http://www.reddit.com/r/piano/comments/x4mw3/need_an_advice_...