Well what my plans are is I just wanted something to make my box thump. I was also hoping to get an amp in that price range I mentioned or a little cheaper if it has a built in fan. I'm not big on knowing systems like that as far as ohms etc. I had some people say get a amp just for the box & let my head unit run my other speakers. I just don't think my radio alone will make my 6.5's be loud enough so my sub won't drown out my sound.For what I described should I get a Kicker,Infinity or Mtx. I was going to go to either Circuit City or Best Buy.