My jury is still out on Serotta. Clearly beautiful, high end frames and bikes. I had a Colorado TG that was a very pleasant ride, but didn't move me. In part, that was because the ST and HT angles were more slack than I like.

My advice, set it up and ride it long and hard before you decide to replace the fork. The carbon fork will same you 1-1 1/2 lbs. And, frankly, I like the ride qualities of carbon forks.