I personally would suggest doing a BB(spacer lift) over doing a body lift. with the rubicon express budget boost kit you get the spacers, shocks, bumpstop extensions, and all hardware. the install is straight forward by pretty much just unhooking swaybar endlinks and shocks, push the axle down and slide the spacer ontop of the spring(which gives you the extra 2''), put new shocks in, and tighten everything back up. i did a BB for a forum member with a friend of mine and it took the two of us 6 hours to do the BB, a 1'' body lift, and a 1'' motor mount lift.
the body lift made me cringe as we unbolted the mounts and used my hilift to jack the body up. i just presonally don't like them, but they do the job and do it cheaply.