[coolhandcountry]

More speed and power than the hv don't narrow it down none. My 9xl has more power than two of the hv maxxes. I get more run time as well to. Speed is above the hv. Your going to run no less than 14 cells maybe 16. 7xl or a 8xl would be real nice. Determine how much runtime you want. 7xl is not to long about 10min or so depends on driving style. 8xl will run longer but a touch less speed.