I'm against any mod that is purely aesthetic. "Leveling" to me sounds like an aesthetic mod, which it may or may not be. If you are raising the front to squeeze bigger tires or to make more room for something else, I say go for it. If you are doing it because you like the looks, I'd pass. There are so many ways to actually improve the truck, I just can't justify purely aesthetic mods.
My real recommendation is to drive the stock truck for a while and see what aspects you like, don't like, and/or want to improve. Everything is a trade off. Generally better on-road performance/ride-quality is inversely proportional to off-road performance/ride-quality. If you want to improve rear wheel hop, you can tweak rear suspension; if you want to smooth out some washboard, one option is bigger tires, which might be made easier with a slight lift in the front...for example.