Someone put a spreadsheet together to compare them all: https://docs.google.com/spreadsheets/d/1gB53-ofWbJaA7uyI8nMHEADObdEeL-146UUMoK9LJ70

XMission has been around forever, is run very competently. Well peered into the Salt Lake Internet Exchange since they run it.

Will most residential notice much difference between any of the five providers? Probably not, but there's some info to make a decision at least.