I have a number of Surefire; flashlights are an addiction to me. My everyday carry light is an A2, soon to be replaced by a L2, and I love it. The size is perfect, only when I put my hand in my pocket do I notice it is there.
I carried a 6P for years until I replaced it with a Z2 (Christmas present), later an E2E and finally my current A2. The 6P is a great light; very durable and reliable. Mine still sits at my bed side with the brighter bulb (P61) for emergencies. For those of you that are wondering, I own 6 surefire lights.
Now, Surefire lights are a great investment, however the aren’t for everyone. There are a number of lights on the market that work very well that aren’t quite as expensive, or use less expensive batteries. Some of them have been listed in this thread.
One that I like is the Pelican Stealthlight – 4AA light is pretty bright and very tough, one of these has resided in my turnout jacket pocket for years and has held up remarkably well. A few members of my crew have them attached to their helmets without issue. The Recoil 2410 is the LED version and just as reliable but a little brighter and longer running. I have replaced my G2 in my truck kit with one of these because of the AA batteries. These are a little big for an everyday carry light; however I did see someone with one on his belt today.
There are many lights out there today, most are pretty good. If you’re looking for an everyday carry light, and can afford it go with one of the Surefire personal carry size lights, the E2E sells for under $100 and the L2 is the most remarkable LED light I have found.
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"Trust in God --and press-check. You cannot ignore danger and call it faith." -Duke