i know theres alot of good subs out there ,but for my budget ive narrowed it down to three subs.i have an xx hercules 2000 wrms @1ohm so im looking for dual 4ohm subs im leaning towards sql loud but sounds good.my choices is two 12inch treo ssi,two alpine type x 12 inch and two kicker cvx 12inch.which will work best?or is there something else out there foraround $600 shipped.all opions appreciated thanks