So I'm currently running my svt7 pro with my ampeg 1528 cab (1x15, 2x8s and a horn) which is rated for 400 watts @4ohms. I also have an ampeg bse115 (1x15, 200 watts at 8ohms) for smaller shows. I am picking up a USA 3pro as a backup or possibly as a main amp. Had one before, loved it, and i like that it has a 5 tube preamp. My question is am I better off using the 3 pro based on the fact that it pushes 450watts/275watts? I know they say overpowering the speakers is better than underpowering them, but the 3pro seems to be almost the exact wattage that the cabs are are rated for. I am particularly concerned about damaging the bse115 by pushing the 600 watts that the 7pro puts out. And as much as I'm not as concerned about damaging the 1528 cab, I do worry a little bit the 8s. Overall what's your opinions on these heads with lower wattage cabs?