im in a predicament. i have the money to get a mamba max, twim 2s lipo to make 4s total(so i can use them in other trucks too) and a GP Ammo 36-56-1800(feigao 8-9L comparison). but i already have my vxl system which is balls to the wall in an e-maxx. insanely fast and tons of torque. should i go for the ammo/mamba or should i try my vxl out first?