Nice Pitman... While you get to spend way more quality time with your blades we always seem to be thinking along the same lines. While I may vary day to day with my 4" an 5" favorites my JackHammer remains my ultimate 6" blade. I like the looks of M6 but I'm guessing the competition grade JH is maybe a little thinner than the M6. Looks to be a similar profile and think these also compare with the Scrapper 6. Think I would like both the M6 and S6 but in a blade this size I think its possible to appreciate the added benefits of a full slab of INFI steel. And it came with an insane convex edge from the factory edge...

My Busse JackHammer with the RainWalker is hands down the blade I would grab if the S ever H'd the F and I was only a able to take one blade. It would be tough to leave the rest behind but I can't see being disappointed in making that choice.