i have an infinity refrence 310a that was pushing 3 12s but got rid of the 12s and now am back to my old audiobahn 10.got any suggestions. im thinking about goiing with these http://cgi.ebay.com/2-HIFONICS-HFi12D4-12-CAR-SUBWOOFERS-SUBS-HFI-12D4-PAIR_W0QQitemZ360140234823QQihZ023QQcategoryZ18805QQssPageNameZWDVWQQrdZ1QQcmdZViewItem