Upgrades worth the money? I am pricing out my new truck now, and obvious the dealer wants me to get all the bells and whistles, but is it really worth the money to get the 5.3L? Z71? I do not tow or haul anything, ever... i want a truck because im into trucks and powerfull engines. Does the active fuel management really pay off enough to warrant the extra $1000? Also, is there any reason at all to get the full power package for $1700 with the engine... All i really want is fog lamps, and the aluminum wheels. Is the z71 package a deal worth taking as a whole if i do not offroad? Will it give the truck an overall better ride? What else in the vehicle does the z71 change other than fog lights/rims/shocks? Lastly, if i got the z71 and the power package, arent i overpaying as both upgrade the rims to aluminum alloy?