So, if you don't do a lot of hard core rock crawling, why do you need 35s or 37s? I've done some of the more hardcore stuff around here, Imogene Pass and Engineer Pass, with 255/85/16 KM3s on an IFS Tacoma. If you're already heavy, then a 35 or 37 will make it even heavier and slower even with the regear.
What rock crawling have you not been able to do with your current 33s?
I’m on 37’s and 4:88’s @ sea level. It’s perfect. Feels good on the highway going 75/80. Even at 100 it felt pretty good. I did some rock crawling wheeling a couple weeks ago and I didn’t have any desire for any lower gearing.