Another vote for Surefire.
Not only US, their warranty covers the globe, mostly with no question asked and they just send you the replacement parts for minor issue like tailcaps
But people had also experienced a brute treatment to their light from Surefire, a guy who reviewed M3LT said he sent his M3LT back to Surefire as theres oil inside the lens, and when the light comes back, the engraving faded and becomes blur
Malkoff, no comment since i never tried the warranty