A buddy of mine is in the same boat. He recently got a new FS-XC frameset that needs a 100mm fork. He was riding a Ti HT with a 80mm SID, but cracked the frame and is now riding the FS-XC with the 80mm fork and needs a 100mm fork soon.
I'm not convinced on Fox. I've got a F80X and F100X and they've done little to sway my vote their way. I'm looking at some new fork options, too: Marathon, Reba, Ronin, etc.
It's been a while since I've ridden a Zokes. The last one I raced on was a X-Fly. It wasn't too bad, but I later went with a RS SID WC and was really impressed with this fork. I know, a lot of people slam RS (heck, I used to be the #1 slammer for years), but my SID WC has 2-yrs of hard racing, training, etc. and it is still going. But, it's been a while since I've ridden a RS (never ridden a Reba), so I'll have to do some more reading to see what the verdict is. My buddy has beaten the crap out of his SID, so he's leaning towards the Reba.
I've never ridden a Manitou, but would like to try a Skareb or Black.
Anyway, back to Zokes. I'm really curious about the Marathon Race (80mm for my SS) and Marathon SL (105mm for my RX-100). What's the scoop on these two?