If you mentioned this and missed it, I apologize, but are you geared for the height (and maybe weight) of tire you're running? If not, the combo of going skinny and gearing for the height may get you close to what you want. I've heard a lot of people say that gearing was the best money spent on a mod for their truck. Not the most visible but contributes a lot to driveability and likely durability over the long run.
I'm thinking about running 285s in the future but want to run 4.70s or 4.88s before or soon after install. I'm currently on 31's with 4.30 factory gears.