I have a 480EX flash, and plan on getting either A: Another 480EX + the HotShoe infrared transmitter thingy, or B, a 580EX II. Any recommendations? I am leaning towards getting the 2nd 480 (Or 420Ex, i dont remember exactly what its called) and the transmitter, as I think I would appreciate being able to put both flashes off camera. Any thoughts on this? Also: Has anyone used these flashes in extreme cold? Last snowboard season I shot with a friends 580EXII on camera, and it seemed to work fine. Anyone transmitted these wirelessly in the cold? Any issues? Any reason I should save up more for some radiopoppers or something? Thanks, and I appreciate ANY help, I'm a total noon when it comes to off-camera lighting!