Next monday I am graduating from HS and I want to upgrade my system. I was going to get 1 15" Magnum and port it and run it with a hifonics 1500 brutus but the d2's are on backorder til the middle of june and i dont want to wait that long. I still want to get the hifonics 1500 brutus but what kinda sub should I go with? I want to go with prolly jus a single 15" set up. My friend has a XXX 15" so that sub is out. I was lookin at Treo's website into their subs but dont know much about it all. So what do you guys reccomend? I really want a clean sounding sub but it has to get really loud. I have about a $400 spending limit on the subs so can you guys help me? thanks