What size tires do you intend, and are you planning fenders/mudguards? Most carbon forks are going to be tighter fitting than the Pacer steel fork, but if that doesn't matter, go for it. Match rake on the new fork, and realize that the same long reach brake might not be usable front and back.

Another option is something like a Tange chromed fork. Great look on certain builds, and should be lighter than the stock Surly fork.