To lift or not to lift

So, I managed to score a brand new set of BFG a/ts 33/12.50/15s mounted on some pretty nice wheels.

Should I chuck a 4.5" lift on my jeep and mount these bastards on there.

Or

Sell them, buy some 31's and just put a 3" on the jeep?

This is not a 100% trail rig, it is 100% DD right now. Once I get some tires with a little more grip, I will take it to the park and hit some newb trails from time to time. I don't plan on hitting the mud, and don't plan on rock climbing. Once I get some debt settled, then I can buy another XJ and DD it, or trail it instead. I am just itching for something bigger.
I would like to stick with A/Ts so, this is my weakness.

Advice please!!!

Get the 4.5 kit and you will still want more. It's a never ending process so get the bigger one while you can. What I'm saying is if you get the 3 inch you will want the 4.5 later.

X2. Started out with 3", went to 5", now on 8" and havent had a chance to drive it and ready to put to 10". It never stops.