You can't go wrong with OME springs and Bilstein shocks for a 2" lift. Be aware that some percentage of people who do this lift (including, apparently, me) experience vibration in the front driveshaft. The fix is to have the driveshaft rebuilt with a double cardon joint. I'm taking my front driveshaft into a driveline shop and getting it rebuilt this week. You can also buy one pre-modified from Great Basin Rovers when you get your springs and shocks.
Adding this lift will also slightly alter the front caster and your truck will steer somewhat squirrelly. This can be corrected with a bushing kit (also available from GBR). I was planning on buying this kit but I've since grown accustomed to the steering and it doesn't scare me anymore.
I went with 285/16-75 BFG Mud Terrains on NATO Wolf rims. If you choose these tires, spend the $10 to get them siped; they'll last longer and do a little better on slick surfaces.