you can't gear properly for a 2650 w/ 6s lipo in an 8ight unless you don't plan on racing.. LOL
you can't gear a 2200 w/ 6s properly for that matter.... if you want 6s go w/ a 1300-1600kv motor other wise stick w/ a nice 4s setup. To be honest w/ that 2650 you may almost want 3s lipo out on the race track.
haha triple digits... make sure you get that on film cuz that'd be sweet... and you might need to duck when the buggy lifts off the ground and starts flying ;)