The E2 was like a door prize. The Z3 had already been discontinued, so maybe he just wanted rid of it, else he didn't know what he had. I've had a P91 in it for so long I dont even remember what 100 lumens looks like. Once you have 200+ lumnen from such a small light, it's hard to go back.
Ironically, though, it's not used much. It stays in my car for emergency use. The E2 is used regularly.