I still have three Arc-LSHP, three Arc4+, a number of Arc-AAA, plus some accessories.
They still are great lights, with the exception of the Arc4 due to the switch. At the time being, they were the "cream of the top", and we paid accordingly.
Consider that Arc pioneered the use of Luxeon LEDs in flashlights, and the problems with tint and flux, at the time, were much worse than today.
Also, they improved the concept of a light with a single cell with step-up converter, that led to the Arc-AAA. The step-up was used previously, in the CMG Infinity.
I also liked very much the engineering part of the flashlight: precision-machined bodies, and a lot of care in the design of the electronics, usually seen, at time, only with SF LED lights.
I also believe, and please consider this only my opinion, that the use of the control a-la-Arc4, with a uP and single button, is not what is wanted, or needed, in a flashlight.
Brightness, runtime, reliability, efficiency, small size, beam shape and uniform spectral distribution, together with "simple" access to brightness adjustment, are of paramount importance.
May be we will see the next revolution of flashlights with RGB Leds. For the time being, I would like to have a switch "flood-spot" on my flashlights...
Anthony