I just got one of these, and was recommend it from someone else:
http://www.overstock.com/Home-Garden/Comfort-Dreams-Select-A-Firmness-11-inch-Queen-size-Memory-Foam-Mattress/3158654/product.html
Only used it for a couple weeks, but I love it so far. They run on the "firm" side. I got the medium and like it. If you are a soft mattress lover, probably want to get the "soft" one.