Looking for the best way to go

[Wetdog]

I have a 06 GMC Sierra Crewcab long box 1ton I want to lift it 6inches and wrap some 18X10 wheels with 35 to 37 X 12.5 ATs and a set of MT for playing around with after winter as for what I have in it its the stock 6600 turbo Diesel 360hp 650ft/lbs with the 6speed allison which I wouldnt mind getting chipped and cold air intake put on plus the dual 4in exhaust but I welcome all ideas as I have not put anything into it yet other then the cost of the truck