I recieved my fenix Ld10 today and am VERY impressed with it. It is brighter than the Sure fire E2Defender that I currently carry on duty. I am now looking for a new duty flash light. I would prefer something that can run on standard alkaline batteries or lithium(If lithium will give me a much brighter light). I want to wear it on my duty belkt and dont want to go larger than my current E2D if I can help it. Would also like to have functional strike bezzels. Is the Fenix TA21 as durable as a surefire? Will the strike bezzels work as well?