35/36's are a good choice for a 4'' lift, and the cheapest route... think more lkie 40's on a 9" lift.
the higher you go the further its gunna eat into your pocket...
what are you wantin to do w/ the truck to go soooo high?
6" suspension lift, 35" x 16.5 wide boggers. No way I'd want a 9" lift for these tires! I don't think I'd have been happy with a 4" lift though. I don't think the wide boggers would fit with a 4" lift without fender trimming, they would rub when articulating.