Lightning stadium basher setup please help

K guys I have a lightning stadium sport and am building a DIY brushless setup for it home made mount home made battery box etc

I will be using one of the cheapy 60a esc from ebay and 7-10 cell packs 4500 mah(building both sizes) lipo is not an option

I am looking to be roughly nitro fast I am not out for mind numbing speeds jsut enough to bash and have fun I know there are more ideal setups as far as esc and battery selection goes but this is what i am sticking with that being said what motor will be best for these categories

TOP SPEED
what motor will give me the highest rpm per volt

BEST BALANCE
combination of top speed and runtime

RUNTIME
what motor is going to last longer than I do

thanks for any and all help