Well im doing a SQ comp car right now and im doin total mobile audio 12"s ..... but my buddy also has 4 12"s in his jeep and they are loud as a mo fo... jsut my 2 cents on total audio.... but outta the 2 u said eclipse... o if u want some good bass i have 1 12" alpine type X for sale PM me for details i even have a 1200 watt amp to run it