Do not get the 8s. You'll get 30-35 mph on 6 cells, which is no better than what a novak ss5800 can do.
If you are super impatient I would recommend the 380c 6t, 7t, 6l w/ the MGM 80 amp contorller or the novak/reedy combos. All are better than the 8s. Otherwise, the release date of the Mamba max is supposed to be june 15th.
Check out my custom converted 8ight:
Sub 7lb, lowest CG of any 1/8 buggy