Thanks so much! Obviously my concern is the integrated system and not messing something up with it. Like I said this is a 2 year lease through my company so I don't want to play around. I can get a 6" bazooka sub installed for about $350, I listen to alternative rock primarily so I am really looking for a solid response as opposed to booming bass. I think I'll drop that in and then look at the others, although the high-end is pretty flat as well. If anyone has a sub they recomend, let me know.