I have five Surefire lights and have very happy with all of them. I guess my favorite is the 6Z with P61 lamp assembly but the 6Ps will fit in your pocket better.
I carry a Surefire E2D all the time and I love it! My only complaint is that the crenulated bezel is VERY hard on regular clothing. It wears a hole in my pants long before my wallet or knife.
Streamlight Twin Task is my personal favorite. I like the Stingers (and so do a lot of other people it appears because they move quickly!) but I am not a fan of the rechargable battery for many of the things I use lights for.
The Twin Task 2D is what I have for everyday use; it runs off D batteries just like my MagLites and the batteries last forever. . . . 3 settings too: 5 LED, 10 LED, and Xenon.
I like the fact that I can carry extra batteries; you never know when you may need to feed your light and not have a charger around. Last time I checked it's easier to pack batteries than a power source for your charger.