For me, it depends on my set-up. If I am using my silenced G3, I stick with Deep Impact. I am usually silent sniping, and don't typically have enemies in front of me unless I am running around, in which case I use the handgun. Deep Impact gets me many kills for that set-up. If I don't use it, I get frustrated because I could be killing someone behind a wall. For my SMG's and Assault weapons I use Steady Aim. Hell, I even use Steady Aim on my M249, it gets surprisingly accurate with Steady Aim. For the M14, I would drop Stopping Power, on HC servers anyways. It seems like overkill to me. For some reason, I like the M14 better than the G3 with the red-dot, and the silenced G3 over the silenced M14.