Dude, this is almost the same situation that I just went through (had cold feet with 35s and the 3.73).
I had the 1.5" performance leveling kit with OME shocks and duratrac 285/70/17. I actually just went up to the 2.5" TF coils with 5100 two weeks ago and 315/75/16 duratrac this week.
I have a 2013 and procal and honestly with the 315/75/16, I don't really notice a difference. My JKU is my daily driver. After driving it for the last two days, I'm averaging just 1mpg less than my old setup with 285/70/17. At 30psi, the tires are measuring to be 33.25"
You can run the 33s with the 2.5" lift, the duratracs are "beefier" looking tires. It doesn't look that bad... but if you're looking to go bigger, I say do it. You'll have regrets either way. But don't get me wrong, the 2.5" and 33s is a great setup.
Honestly, I have a 20 month old son and my wife is really short, so I thought the 1.5" and 33s were perfect, but after I started wheeling, I realized I wanted to go bigger in lift and tires. The problem was also the additional costs. I ended up going with the TF front control arms and JKS trackbar. You don't have to do it, but it makes a world of difference. If I were to do it all over again, I'd go 2.5" and 35s.