I like quality tools but have only had cheap Stanley or equivalent hex wrenches in the past. I finally became fed up with the ends twisting and rounding off on stuck fasteners and did some research on them. PB Swiss seemed to consistently have good reviews and quite a following, so I purchased a few sets of these from Count on Tools, which appears to be PB Swiss’s online store. Got a chance to try them on some corroded marine fasteners, and they are impressive. They either removed the stuck fastener, or on the really stuck ones, rounded out the inside of the head, with no damage or twisting whatsoever of the hex wrench itself. $135 for all three sets, shipped, but I feel it was money well spent. I also heard good things about Wera as well, but their sets seemed to be missing quite a few in-between sizes that seemed important.
Love the comeback!