I'm a bit heavier than you and had a CF fork on former commuter. I abused my commuter with potholes and RR tracks. The commuter was finally taken out of service by a Camry. She hit me with a glancing blow to the right front hard enough to crack the front rim and bend the AL frame but the CF fork was deemed fine (though I retired it along with the frame just to be safe). I vote for a CF fork but I wouldn't buy a used one unless I knew (and trusted) the owner.