Garage floor coating?

I'm in the process of buying a house, and one of the things I'd like to do before I get all moved in is coat the garage floor with an epoxy of some sort. It's nice and clean as it is now, and I know that stuff takes like a week to cure, so I'd like to jump on that and get it done before I move my cars in.

What brands/systems have you guys used and how do you like them. About how much would you expect it to cost for an average sized 2 car garage?

i have used the stuff from walmart worked great I added the anti skid stuff