Instigator or 1x1 fork?

I have seen this bike run 26 with up to a 130mm fork, i think it was stock 100mm (got the frame alone). I for sure wanna go rigid, I just don't wanna get WAY slack on the HT angle.

I am leaning toward the instigator fork, a wide rim and 2.55 WeirWolf tire. I currently ride a 26er with an 80mm fork, should the above setup provide similar squish (other than big hits)? I cant wait to get this thing ready to ride and post some pictures! Winter in MI sucks!