I'm considering adding another cab to my rig. Played an outdoor show yesterday and felt I could have used more oompf on stage. My current rig is powered by a QSC RMX 850 running bridged into 8ohms for 600w into the goliath. With the RMX 850 I'd get 830w split between two 8ohm cabs approx. 50/50 right? Would it make more sense to go with more power, possibly the RMX 1450? I have roughly $550 USD as a return credit @ Musicians Friend that I'd like to use unless I go with Avatar.