If you want a better ride, Bilstein 5100's seem to be one of the more preferred choices on leveling. I swapped my factory rancho's out and have been way happier with the truck. Had a 2" strut spacer on prior which did the job but the ride was terrible with the rancho's. I plan on going one size up from stock (275/60/20 A/T's) in the next few weeks as winter is approaching, the stock SR-A's are complete garbage. Should require no trimming with my wheel setup (20x9, 0 offset) and give it that aggressive look paired with the 5100's.
My 2 cents on performance upgrades... Airraid MIT, drop in filter and air box mod, with a L86 intake manifold/TB (if you have the 5.3) and a custom tune really wakes the truck up on a budget and for a daily. But trust me when I say... once you start modding, you'll never want to stop! ?