koxx 1 or kh for muni

No, but you can fit a 26x3 wheel in the KH 29er frame. musketman did that.

buying a koxx one and getting longer cranks seems easier than buying a 29er frame and whipping out a 26" wheel to put into it

if you want a 26"

i called renegade and the brake comes with it, im new to muni, but does 140mm and 160 make that big of a dif?

it makes a big difference.

I highly suggest getting a 29er frame(like KH) and buying some KH 165mm moment hub and cranks, a sun dublewide rim, and a tire, and having the wheel built.