[Lippyp]

I still say, in an area as small as a truck cab you just need a sub, amp and decent set of components up front to get a fantastic sound. I'll let you know what mine sounds like when it goes in. I'd keep the tweeters and fronts as far up front as possible. The way someone explained it to me is you don't go and sit with your back to the band at a concert, so why do you need rear speakers? If the front soundstage is setup properly you'll not need them.