I have read that the .260 is a very accurate round at longer ranges. I'm wanting a medium size round that can get the job done at longer ranges without the big magnum recoil.
If you are using it primarily for long range target shooting, its tough to do better than a 6.5, especially the .260. It shoots flatter and bucks the wind better than the best long range .300WM loads- with a whole lot less recoil.
For hunting, either would work, but the 7mm-08 has more factory loads available and is easier to find.