I have a Bergantino 322 and a EBS Td650 head. The head is about 520 watts @ 4ohms and 650 watts@ 2ohms. Its the perfect sound for me but Im maxed out on power and volume. The band has two marshall 4x12 cabs and a pevey for guitars (three loud guitar cabs). Last night at a gig I ran the 322 and two bergantino 1x12s, all at a 2ohm load. The volume and sound was great but Im worried about pushing the head so hard and yet under powering the cabs. My question is would it be allright if I powered one cab with the head then line out of the head into a power amp to power another cab. I was thinking about getting another 322, 2x10 or the 2x12. Wich one would you choose and how much power should I be looking at. I would use the two 1x12s or the nv610 that I have but I need two be able to stack the cabs to save room on stage. I might have to sell the nv610 to get another cab. Thanks for your opinions and help! BTW, ya I use ear plugs.