Dude just stick with the 8x10 you will regret not having it in the future. and almost any vehical that can haul the 6x10 can haul the 8
i agree dude. it would be so much more worth it to get something along the lines of a 2x15 vs trading away your cab and downsizing. i can find you a sunn 2x15 cheap. ill get on it now and PM you some info.