the 7xl would have the most power but the least amount of runtime
the 11xl would have the least amount of power but good runtime
a lot of people go with the 9xl because it has good torque and you can get good runtime out of it.
all of these motors would have more power than your HV-Maxx though.
nick, thats not really an accurate figure. there are many factors in the amp draw and thats probably a spike or short burst. they probably rate it so high so somebody will buy a 12020 instead of a 9920 for instance or to cover there ass' if something happens.