I'm a data nut, too.
In short, the rule of thumb is to use the biggest gear that you can spin at a max of 135-140 RPM on a flying effort. (The rule used to be 150RPM, when "sprinter gears" were 90-92".)
That being said, I've heard several sprinters say that they will clock the same times using gears 6 gear-inches apart. Basically, if 37.5MPH is your top speed, you are going to hit that using 92-98 gear-inches, no matter what. This seems to be the case for you, too.