I'm looking to buy a new rig and here is what I have decided on: Ampeg SVT-3PRO (450 watts at 4 ohms) http://www.guitarcenter.com/Ampeg-SVT-3PRO-Series-Head-100140363-i1145693.gc Carvin 2x10 (8 ohms / 400 watts) http://www.carvinguitars.com/products/BR210-8C Carvin 4x10 (8 ohms / 800 watts) http://www.carvinguitars.com/products/BR410-8C I want to make sure this rig will function like a well-oiled machine. I'm not an expert in the subject and there's a few things I'm worried about: - the two cabs combined wattage is 1200 watts. Will a 450 watt amp be too little power? or too much power? - two 8 ohm cabs equals 4 ohm impedance so it should work with this amp, correct?