I have an ARC Lite (Special Edition), one of the old or first ones with the then brighter led.
The main thing that sold me was it's ability to use off the shelf AAA batteries. In an emergency or disaster and possible world-wide travels (which I used to sometimes find myself) the standard AAA were and are easier to come by (spares not withstanding).
Special battery requirements or sizing, in my opinion, detract from the practicality of a Survival flash-light.