Thanks a lot. I figured that fosgate would be the way to go. What about Polk or MTX? I haven't heard much about MTX on this site. I was just wondering because about a year ago this guy that I know put in a "really sweet system" for about $2500 CDN. That included install and an alarm, but it doesn't sound like $1600-1700 USD worth of bass. It's loud sure, but it's not SUPER loud. Plus all he got, if my memory serves me correctly, is a Clarion deck, two 5 1/4" (I'm pretty sure hooked to the deck) and two MTX subs hooked to a MTX amp. I don't know models because this was before I got into car audio. I just want to know some opinions on MTX, or any other brands that I should check out.