Is your TJ bone stock (completely OEM suspension/shocks)?
That is going to have to be your decision. 33" will make the Jeep be geared taller than the 31's, so the bigger the diameter, the more the need to regear (~$1200). But personally I love my 33" and I still have 4.10 gears on my 4 cyl.Also which would you recommend? If I got the zone 3" I would buy 33" tires. But if I get the BDS 2" I would buy 31" tires