I would either do the shackle reverse or lift springs. You can get away with stock shocks on both but longer shocks are recomended. Springs vary from a couple hundred to 500 or so. The nice thing about springs is depending on witch brand you choose, the ride can improve greatly. They also bolt on in just a few hours with simple tools.
I have never run the shackle reverse but know people who have. They have all seemed to like it a lot. I think it is a bit cheaper than springs.
Just for some ideas here is a OME 2" spring lift with 30" tires

Here is a Shackle reverse lift with 30" tires
