After months of using mine (see equipped) ive grown to really like this roll. A lot of people will go for high stability. I actually prefer a little less stability as I have more success aiming center of mass and having the gun climb to the head. Aiming center of mass with a little less stability also helps if youre taking hits in a gun fight. This is what has worked best for me using this gun. I think you can make almost any roll work for you if you have the patience to play with it long enough (you might lose a lot of battles in the beginning). I also like counter balance because it seems to guarantee that the gun will climb straight up (not sideways).

A bit late for the op, but did anyone pick up one of these this weekend? The middle option has LB Assault sights, Crowd Control, Counterbalance then Snapshot/Fotted Stock/Rifled Barrel. It's just fantastic. He's selling it again next week.