The RAGE brake from UM tactical is hard to beat. It's absolutely tunable for the rifle and the shooter. I've seen kids shoot this and the rifle doesn't hardly move. Really great product.
I really like the .308, so versatile. Don't know a lot about the .260. The 6.5 Creedmore is very effective and less expensive to shoot. Since most shots on big game occur at 300 yards or less, .308 should be great.