I game at the same resolution, the only reason I am getting the 6870 over the 6850 is because I had some extra money to spend after building the new computer.
My original plan was to get the 6850.
I had to RMA my 1950XT way back when. I remember it took almost a month to get the replacement, But the only thing I paid was shipping to get the bad card to them.
I am looking at using the 600T for my next build. I was wondering if it was possible to put the radiator from an H50 or H70 on one of the top fan mounts instead of the rear exhaust mount?