I recommend not going over 2". Your body mounts will thank you for it.
All of the 2" and up are made out of plastics now. Back in the 80's and early 90's you could get aluminum body lifts that were 3" tall. All of the aluminum ones have disappeared. Good thing too. People have learned that tall body lifts aren't the answer to lifting a vehicle.
The other concern is that these body lifts sit on top of the existing mounts and if they are warn they will need to be replaced.
Now you see many 1"-1.5" body lifts. These came about because people wanted that extra lift to go from 33's to 35's without having to reinvest in a suspension lift. MORE, Daystar, JKS, Currie are just a few.
Daystar is the only one who replaced the whole mount. Less individual parts and replacing old worn mounts is it's biggest advantage.
Out of these 1" kits, there are two different types. polymer and aluminum. The advantage of the aluminum is that it doesn't degrade but can be cracked and will rust over time. Polymer mounts will absorb some vibrations compared to aluminum but can rot over time. They won't rust though.
If you're looking for some lift I suggest that you do it properly the first time. Save up if you have to. Adding a 3" body lift will require extending the fuel lines, extending the steering shaft and relocating the fan shroud. Also, the transfer case and transmission stuci (manual) will need to be extended since they are attached to the frame.
If you're really hard up for cash, I suggest spreading the 3" around. You can do a 1" body lift 1" shackle and or go with TJ flares and make an additional 1.5"-2" of room.