I just received mine yesterday from macmall. It's the 15in with 2.7ghz, 16gb and 750hd. It has a Samsung display. However it is a late 2012 model with number starting with Z0.
Did some research into the model numbers and the Z means it was upgraded at the factory. So I take this as meaning it was built to order or it was an older model that was upgraded.
IDK, but the price was right at $499 off and no sales tax, so about $900 less than buying from apple store.
Very happy with it, very nice machine.