I think I'm with you on the Proto satin finish. I've gotten into these GJ debates over satin vs high polished finishes, but simple physics (yes, I know it's science) dictates that because of the irregularity of a satin finish, it simply presents more surface area per square inch than a smooth surface, thus more friction, thus more surface area contacting your hand, thus a better grip. Think of all the animal appendages in the natural world and the kinds of surfaces they're designed to grip--nature itself says nay-nay to mirror-like tactile surfaces. Last time I looked, our hands are members of that same menagerie. I always ask if you were about to fall over a cliff and needed to grab something to save yourself, would you rather have something with some surface texture to it or a mirror-polished steel pole? Yeah, the polished cleans up nicer, but that's after the work is done.
Were I in need of buying new combo sets, I'd look at US-made first--that's just my upbringing and age. I don't want anything with knife-like or squared-off beam edges, which kind of eliminates brands like Snappy or SK for me, the latter which is kind of a shame for me because one of my favorite wrenches for fit and feel in my hand are the old SK-Lectrolite Defiance factory style raised panel wrenches (OK guys, go ahead and laugh). Of all the modern USA stuff, the best-feeling handles to me are the Wright Grip satins, but I'm with most others in that I'd like them a little longer (hey, Wright Tools--haven't you got that yet?).
As for the anti-slip, I've not used enough different designs in modern tools to have a personal opinion, but from all I've read on GJ, the Proto ASD seems to get more positive votes and less negative than any of the other brands' anti-slip devices. Even with the negatives, the Proto normally gets an agnostic 'meh' while those not liking the Wright or Snap-On methods feel rather emphatic against them.
With all this in mind, if it were me, I'd personally go with the Proto satins.
DISCLAIMER: This is just one man's opinion. Your mileage may vary.