Synthogy is still the top of the line for me and many people. There are some equal, but I don't know of any better. I have Ivory II Grand Pianos which includes three different pianos for about $329. Ivory II American D for about $189 is a Steinway only.
My Ivory II Grand Pianos Steinway sounds so real I can smell the wood and felt.
http://www.sweetwater.com/store/search.php?s=ivory+II&Go=Search There are a couple of new huge piano sample libraries out there but I am not convinced they are better.
It is funny how spoiled we have all gotten. Most real pianos in the world don't sound as good as some of the less expensive sample libraries like True Pianos, and the real ones are always going out of tune, have to have mics placed perfectly, etc.