I need help in deciding if I should go with 2 Earthquake 10" or 1 Earthquake 12" or I could even go with one SVS. My priority is HT slam and quickness with music. The sub needs to play loudly to at least 25hz which I believe the bigger ones will do but I'm not sure about the 2 smaller ones. My room is approx. 4000 cubic feet. Let me know what you think.