I am newer to this, and my only "higher end" flashlights are probably what you'd all consider toys, but I do inspections for a living, and crawl around dark places because I need to see what's going on in them....with the seeing part being very important.
I've had a couple of Inova X5's, one UV and one white light, and they are indestructable. Both in use from somewhere around 2002 or so, my first LED flashlights.
I've also had great luck with LED Lenser's T7, it also seems indestructible, and the slide forward/back to go from spot to flood is both handy and reliable.
I had some Princeton Tec's, but they were not sturdy enough, and they failed for one reason or another.
So, so far, in my limited exposure to this world, Inova and Lenser are reliable.
I've never heard of some of the others mentioned here...but, I am....intrigued.
