Don't forget that you have to add some Warrior shackles or AAL to the back, after you do the torsion bar twist. Also you might get 2", you might not, it just depends on the truck. The most I got was 1.5" on mine with the torsion bar twist
JZ, You really have to ask yourself, what am I going to do with my truck. It might be better to do a body lift, than a suspension lift, if you just want bigger tires. If you really want to do some rock crawling, then spend your money on lockers, gears, and a better transfercase. A lift kit won't help you get over things if you're still running open differentials.
Take a look at GJarretts truck. He only has a 3" body lift, runs 35's and and has done some of the greatest trails in the United States, Tallico, The infamous Rubicon, and so many others that I don't have time to mention.
You can't just get bigger tires and that's all you have to do. With larger tires, comes a gear change, in order to keep the rpms in the normal range or you loose power and MPG, especially if you jump from standard size to 33's and over.
Just something to think about.