I just purchased a Surefire.
I went to Gander Mountain where they had a full display of all the models and all of the attachments. I like the idea that the Surefire is small, but that was not the main objective; I have large, deep inside pockets in my jacket. After viewing them, I bought the 6P in gun-metal.
To that, I added a single LED head, the KL3. A multi-LED would be sweet, but the KL3 made a clear blue-white light, and I felt it would be less of a drain on the batteries if needed.
I could not see the use of a pocket-clip either, and I'm glad my model did not have one.
I've been playing with it, the gun-metal finish looks great and the button-press on the rear makes a great addition to using a pistol in the dark. There is a cross-wrist method I use where you press the light for a second, take a sight picture and move quickly. I works wonders for this. (I hate to admit this, but late one night I shut down all of our lights and 'shook down' my own home, both floors!)
Oh well, my wife says that there is a big raccoon that has been wandering around in our back yard. "Hey, you in the mask, freeze, sleaze!"