i did the same kind of thing when i was looking for my EDC, my first focus was output, then battery life, then size, then form factor/looks. I chose the quark123, output was highest, and on moonlight the battery life was longest, size was small, and the form looked good. I love it, I have used it at the very minimum every other day since june. I have been eyeing the EX10 because i would love to give that piston drive thingy a try, but not till they can boast more than 145 lumens. I couldn't justify that. E1B has much less output and costs much more. (I know its a surefire!) I own several of the larger surefires and love them, but for something thats going to be clipped to my pocket and bashed and slammed and mangled and eventually lost (its inevitable) I don't want a light i will feel guilty losing. Almost all the HA is gone off my quark and it has several large gouges (character) but when i need a flashlight fast I always find it there in my pocket. I hope this helps somewhat, though it sounds like your mind may already be made up lol.