Another vote for Bondhus. Just about every hex wrench that touches a bike is made by Bondhus, and I'd be surprised if any other industry worked 2-8 mm hex wrenches harder than the bicycle world.
I also think PB Swiss are grossly overpriced. Cute wrenches, but they can't be better than the Snap-On gold-finish set...which I believe are made by Bondhus. Maybe they're made to Snap-On specs? I've been using a set of 1/4" Snap-On gold-finish hex bits for a year or so now, for most of every day, and they show no appreciable wear.
Last suggestion: if you live near a bike shop and aren't concerned with country of origin, get a $20 set of Pedro's L-wrenches (1.5-10 mm, Taiwan, marked only SnCrV). I've never seen a better set for the money, COO aside, but I have seen some Pedro's wrenches wear faster than others (suggesting there's a QC problem at Taiwanese-supplier-of-the-month). (Also, if you live near a bike shop, Park hex wrenches are made by Bondhus. Any half-decent shop should stock either Pedro's or Park.)