help with bl choice 4 kyosho twinforce.

[ghostriderlund]

hello guys my twinforce weighs only 4,5kg with 12 cells and rtr with the stock config dual 550motors. i have done some changes to it to get the weight and the cg down so it handles better. with lipos and the 8xl it would be just about 4kg i guess.. but what motor will you suggest then if i have to use only one. my bl esc can do 6 lipos or 16nimh cells and 100A const and 120A peak. is there another option? i dont have unlimited funds.. i have 280usd to go with and already i got batts and 1 bl esc. and for 280 usd i can get another esc and dual 8xl.. hmmm i dont want to do something thats plane stupid.. i dont want it to look cool i want it to run like hell :)
thanks for your advice guys.