For $200 you won't be getting much. Casio and Yamaha consumer level keyboards are about all you can find at this price range. You might find velocity sensitive keys, but probably not "weighted" and definitely not hammer-action. The sounds themselves will be sorely lacking in quality.
I am a firm believer in "you get what you pay for." If I were you I would save up and get a nicer keyboard. That being said, if all you can afford is $200 ... then buy the one YOU think feels and sounds best. At this price range they're all about the same.
Incidentally, a Yamaha P-90 is about $500-$600 and that's the one I was talking about in my previous post.
http://www.zzounds.com/item--YAMP90
Doug