I've got an OLD carbon fork on my bike. It still works great (and is VERY comfortable) even with HEAVY loads. I think the early carbon forks were "overengineered" because the properties and wear characteristics of the carbon material weren't well known.

I think current carbon forks (those NOT designed for loaded touring) are now MUCH lighter but don't have the safety factor of mine.

As to comfort, I find my carbon fork one of the most comfortable I've ever ridden. Good luck!