Lear Wanna Be said:Handsdown, the INOVA T2 flashlight. About the size of a mini maglite. It is like having a light sabre. I don't even bother with the deice light as the flash light is much better. Comes with a red lens that flips up/down. However, it is expensive and takes some weird size battery. This is the one you might have seen that they were giving away if you purchased a Bose headset.
Wierd size battery? It's only a CR123 size battery. All of your more higher end lights are going to use those since that battery packs a big punch in a small package. You can get them online for like $1 each which comes out cheaper than certain alkalines. Plus they've got a 10 year shelf life. You really can't go wrong. Go online to places like batterystation.com or surefire.com or anywhere else like that and get like $10 worth. It will last you a while and they'll never go bad.