LX2!!! i don't think its even debatable. i've got an M30 w/ MD2 host and M60 w/ UF host and love them both but they can't hold a candle to the LX2. i never intended to EDC my LX2 but it turned out to be a little smaller and a lot lighter than i was anticipating. if you go that route then get the diffuser also, i think its part# F04. the beam pattern is pretty sharp so the diffuser will make for excellent short range use and protect the optic while in your pocket. it annihilates nearly all my other tactical size lights...the Malkoff's, Olight M20, C2 w/ Thrunite's XP-G dropin, and every other XR-E dropin i have...even an MC-E dropin. i did just get a Quark 123^2 w/ the XP-G turbohead and this is my only small light that can match the LX2. you may want to consider that as a possible EDC, even w/ the turbo head its smaller than the two you're looking at and kills my M30/M60 in output. you can also get the 123^2 w/ a standard-sized head...even smaller but retains the same emitter and driver.
Malkoff is releasing some XP-G dropins in the next week or so as i understand...may be worth holding off on your purchase.
does anyone know if there are travel restrictions on Surefires? i've been under the impression that they may be considered weapons and are subject to being confiscated by the TSA though have seen nothing in writing that confirms this.
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i checked the TSA site for myself...makes no mention of flashlights one way or another which i suppose is good news but its possible that i missed it. FYI, we're not allowed to take throwing stars, spearfishing guns or cattle prods onto a plane...apparently that is frowned upon. they can be so nitpicky sometimes.