I could take or leave the different 'm's. That didn't make it pop any more to me so I'm not sure how to rank those. Your alternate idea, #71, is great though!
I really like your designs, but as I'm looking at them more, I'm realizing that they aren't really speaking to the "high", above the line type thinking that we are going for. Your play on the H and the M is very cool, but I need the logo to show a sense of "improvement and innovation"