the thomson is never going to fail, keep it, those things are built to outlast any frame. both of those forks are highly regarded, either should be fine if the rake is the same.

i also own a ti frame that uses a 1" fork. since carbon steerer tubes scare me more than excess weight i went with a fork with a steel steerer tube. its really very heavy, but well made and should easily last a decade barring any abnormal abuse.