Just say NO to Tippy, Connor.
I have felt tippy in off-camber situations when aired down and 150 lbs on my rack. Otherwise, I like the height advantage of my 5.5" lift/33" tire combo package (aka
value meal #6). I also agree with Sean that 33"s, a locker, and proper protection can take you almost anywhere (sans little sluice) in Nor Cal. That being said, I have not been everywhere in Nor Cal, but I have had good success with what I have wheeled. Superior driving skill, notwithstanding.
I'm a few inches taller than my kid's Jeep, who runs
value meal #4 (4.5" SA lift/32" tires), and his Kevlar's are as tall as my BFG KM2's. That's another story, but just know that he rubs badly and I don't. Difference being his 11.50" tire width and my 10.50" tire width (same rim backspacing).
This reply is all over the place, so allow me to summarize. I'm happy with 33" tires. My next set will definately be 33x11.50's for a wider tire. Not that I'm against my skinny rubber, but I just want something different. Too soon to plan for that, but 25k miles per year will quicky wear down my new KM2's. I have enjoyed them in all conditions, from street, to snow, to rocks. Uh, mud...not so much, but I don't have to tell you that.
At risk of offending the 6.5" LA/35" tire guys (yeah...
value meal #8), I would not run 35" tires on an XJ for a couple of reasons. Largest concern is budget. Think stronger axles/gears, longer shocks, more expensive long arm lift, upgraded steering, better brakes/rotors, etc. I love the look, but 35's require more $$ than I'm willing to spend.
Another reason is height. I'm not too concerned about getting tippy (say NO to Tippy), but climbing in the rig with
value meal #6 is difficult enough right now. I need to stretch properly before climbing in my rig, and at my age, things don't bend like they used to. Another few inches taller and i'd be sucking air from the stratosphere and scraping hair on the overpass.
Good luck with the decision. Just say NO to Tippy.