I really don't know much about these things, I apologize.  I don't play anything in particular, I'm just going to take it step by step until I get good, and if I'm still interested, by a more expensive Keyboard.  In terms of how many keys, I'd prefer 88.  I really know nothing about keyboards, I'm sorry.  Basically, the keyboard that is closest to a regular piano is probably what I'm looking for.  Just something to get me going.  Any extra features are nice, but not necessary.  I don't know what weighted action is (weighted keys?).  If it allows me to play the most like a regular piano that would be great.  Essentially, I want a keyboard that most resembles a piano.  Sorry I'm so vague but I don't have much information on the topic.  Oh, and price.  $400 is probably my max for this.  If there is one that is significantly better for a little more, I'll consider that too.  Like I said, if I really enjoy it, and want to continue to get better, or enjoy playing a particular type of music, I'll look into getting a more expensive one when the time comes.  Thanks for replying, and thanks in advance for any other info you provide!