That's a good setup for pedaling downhill, but it does give you a bunch of duplicate gears. I think you've got a 77.1 and a 78, a 45 and a 46.8, and a 60 and a 58.5. I'm not a gearing wonk by nature, though. It doesn't really matter if you have 7 gears or 10, as long as you've got a range as wide as you need. This is my first venture into half-step gearing, and I kind of like it. But then, I kind of think that pedaling downhill IS fun, especially when I have no choice. "Oh, no, it's not that I'm out of shape or lazy--I'm just plumb out of gears."