The point about not using red light in an urban environment seems like a good one. You don't want to turn on your light, only to hear someone yelling, "He's got a gun!!!" Thanks for providing this tip!
Personally, the Micro Photon works for me. I want something light and small, and I can compromise on the lumens. I usually have a much more powerful light in my purse. I'm sure the Feix L1D and Nitecore Tip are brighter and more capable, but they are a little too big for me.