I am a complete novice when it comes to car audio so please bear with me... I drive an '07 Chevy Avalanche and am looking to put a system in... I have been told that 1 10" should do the trick but I am completely lost when it comes to what I need to look for equipment wise.. Also, when I decide to go with it, would I have to sacrifice the back seat to put the sub in? Or would I still be able to put the seats back with the sub in? Thanks for any help guys!!