Welcome from Broomfield! The JK is going to swallow those 34" tires I would go bigger if you can afford it plus you will go bigger anyway once you get tire envy. I always wanted 35" on my JK got them joined WAL and now I want 37", just something to consider, I think the 37s will fit under a 2.5 lift no problem, I may be mistaken though. I wish I would have went to37s out the gate but now I will have to pay twice.
Side Note: If you didn't already notice, we are having a Colorado meet on May 9th. at Wonderland Brewery @ 1PM in Broomfield, Sheridan and 120th.