I have a set of David Clarke H10-60's and although they're a comfortable fit and give clear, defined sound I get really irratated by the detachable plug that connects to the earpiece. The plug is about 1.5" long and can catch your shoulder when looking around.
Although the detachable plug is useful when storing the headset I feel that the H10-13.4, with a fixed cable to the ear piece, are much less prone to catching your shoulder, keeping your focus on flying with no unwanted obstruction when looking around.