Only thing I don't like about the 290x's is the heat issue with them. Look on Tom's home page, you shouldn't have to replace thermal paste and the cooler on a new GPU just to get the temps down. It almost seems like a rushed product, as all of the new R-line. I see so many threads on here a day about the R series and driver issues, etc. I was looking for a new card about a month ago and the 7870 or 270x, are the same card and same priced about and I went for the old classic 7870 instead. They are tried and true, support GCN so they will support Mantle anyways. I was only looking for a single card though. The above poster makes a good point that two 7970's will be your limit now, getting 1 290x can leave room for crossfire down...