I put on a 3" procomp leveling kit, cost about $200 but i installed it myself. It took me maybe 2 hours, and it was very simple and straight forward. You can search my albums and see what my truck looked like before and after if you want. I did notice that my front was about an inch higher than the back, but i did have a tonneau cover that was about that high installed over the bed and I never thought the front was up too high unless I looked only at the lower half of the truck. You could do a 2.5 or a 2 inch leveling kit and it would make it about even, but I have heard of some trucks getting a 3" and it settling down to a 2" after a few months of driving. idk how true that is, but it is definitely food for thought.
Airbags are usually for the rear of the truck, so if you wanted to do those with the leveling kit, you could, and you could basically lift the truck, 3" in the front and 1" in the back.
Any other questions feel free to ask.
