Invest in a pipe extension, not a "better" wrench.
Stop over tightening your pedals. When it's someone else's bike, I understand the urge, but for my own bikes I go wrench-snug, maybe 8-10 pound-feet, and I have never had a problem, even on my mountain bike that I ride down Stowe in the summer. The pedals naturally tighten themselves as you ride, and you'd have to be exceptionally daft not to notice if it started to unwind.. there would be a ton of play beneath your feet.