Call me biased… I won one of his contests and picked the M1, did a review HERE and have found my new serious duty lights. I also feel confident in buying these for others as the level of build quality is great and backed by Randy, the owner of PFlexPro.
Even a regular M1 is a good light for something like this, but the PFlexPro lights are fully potted and very well put together. Great choice of emitters as well as a bullet proof warranty.