Are you planning on riding centuries with it? I'd stick with the alloy fork unless you plan to do lots of long distance riding. I used to take mine on 20-30 mile rides, and it wasn't too punishing. Definitely more jittery and stiffer than any steel fork I've ever ridden, but not terrible. Ride 25s at a comfortable pressure. I tried 28s, but they wouldn't clear the fork at the crown.

One thing's for sure, that frame can accelerate and it climbs hills like a goat!