I just got a 2.5/3.5 Rubicon Express lift, after having bumped it up to 35s. IMO, its the perfect size lift and tires to flesh out the proportions. any higher, the wheels look little. 37s are just too big for my taste, but would fit in the future and look fine. A little “before & after”

https://www.jeepgladiatorforum.com/forum/threads/2-5%E2%80%9D-lift-with-35%E2%80%9D-tires.47658/page-2