The Innova X5T wins in the Coolness factor, and for EDC. Way cool looking, lightweight (because of the lithium batteries), bright enough, 20 hour run time, and not too expensive compared to SureFires or ARC LS's.
The Innova X5T has become my 2nd EDC light, along with my ARC AAA. (I can't believe that I now carry 2 lights every day!)
However, the Streamlight 4aa, 7 LED light is a light that I might grab when I know that I MAY need a light. Fits in the pocket easy, more light than the Innova X5T, uses cheaper AA batteries, and has a longer run time.
Now, the Streamlight 3C, 10 LED light is a good example of a light that I would grab when I KNOW that I am going to need a light! While not quite as bright as the brightest Luxeon Stars, it is way bright, relatively inexpensive, a very WIDE field of light, has a very LONG run time (of course, with diminishing brightness), and suprisingly easy to carry.
The Streamlight 3C, 10 LED light is probably the closest thing to the ONE light that I would want with me, with fresh batteries, if stranded on a deserted island.
Then again . . . maybe some of those Budweiser models, and an unlimited supply of beer might be a better choice!!!