RC, how do you find the beam profile outdoors? For me, the XHP70 is extremely floody. I have a ZL SC700d, which uses a larger reflector with its XHP70. For me, that seems about as floody as I would want the beam profile in order for it to be useful outdoors.
Aesthetically, the light is super appealing. If it were me, though, I’d do the Ti version, but with 14500 and something more reasonable for the LED (SFT40 or SST20) or aluminum in 18650 with, again, something a lot throwier than XHP70. The reason I suggest Ti in 14500 is both cost and heat - Titanium lights generally can’t even handle 18650-tier heat outputs, I don’t know who they’re kidding driving an XHP70 hard in a Ti light.
FET drivers have high initial output, heat and battery drain. Brightness drops steadily as the battery drains. Regulated lights put out a constant brightness until the battery voltage drops to about 3.7 volts on high and then usually steps down to a constant medium level until about 2.8 or 3 volts.