Id run 4s. You dont really need 5s in a buggy IMO. For any tracks I race at that would be WAY over powered to race with. Better have a good throttle finger lol
I still want a eight! Maybe after my .5 I will build one!
5s will only be overpowered if he runs a motor too fast with that setup. A 5s setup with the correct motor will run cooler and longer than a comparable 4s setup.