A BB is pretty darn basic... spacers, bumpstops, and shocks . . . hard to go wrong with the spacers and bumpstops . . . buy em cheap . . . look on ebay and the likes cuz as long as they are the correct size, they're hard to screw up. The shocks are where you'll want to spend your money and I would avoid, the cheaper Skyjacker, ProComp, Rough Country, etc shocks and get something decent . . . lots of guys like OME for a softer ride and Bilsteins also seem to be pretty popular. If your springs are old and saggy, you can also look at kits that provide new and longer springs vs. spacers, but many like the OME 2.5 kit may require dropping the belly to avoid vibes, which is counter productive. I had a Rubicon Express BB with 31s for a few months before going to a 4" lift with 33s and it performed better than stock. Just get some decent shocks and you'll be set.