I have currently have two subs an SVS 25-31, and an earthquake supernova III. The SVS I know has a Q of around .577, and I love its tightness and speed, but its to dry for the rock music I listen to which is what I listened to most. The earthquake is great on most rock music, but can sometimes be to boomy for movies, and quick bass.( not sure of the Q .707 - .8?) (Im selling the earthquake soon) Since Q is the biggest factor in the sound of the sub which Q should I go for? I am buildinf a passive radiator setup, FOR MY NEEDs, will a Q of .647 work? or should I go with a Q of .707?