For bashing on the street I run a Hyperion G3 3300 mAh 6s pack in my 8ight, using the Tekin 1900kv buggy motor. Loads of fun. Very fast, long runtimes, and cool temps.
Check out my custom converted 8ight:
Sub 7lb, lowest CG of any 1/8 buggy
Yeah, it's just a matter of choosing a motor that is suitable. Most people shoot for ~35k rpm. At 6s, that would be a kv of around 1600. The Tekin 1400kv buggy motor would be perfect IMO, and Mike has 2 in stock (as I type this).