What bl motor to use with 3s lipos

[Heyitsme]

Ok let me try to make this short as possible, at first I was trying to order the VXL rustler, but then decided I did not want to wait 40+ days for it. So I went ahead and order a XL5 Rustler, bearings, carriers, rpm bumper, wheelie bar, Durtax Ice charger, balancer, ir temp gun and other stuff. An now I want to order the brushless motor and lipo. I want to get the Maxamps 3s 8000mah lipo, and the mamba max 5700kv motor, My question is will I be fine with the temps on the motor, with medium bashing? I started to get worried when I read people having heat issues with the 5700 and less volts. I will gear down and get a aluminim tranny case if I must. Or should I go with the mm4600 motor or maybe even a diffrent brand motor like the Feigao 12S with the mamba esc. Thanks for the input, im trying to order the motor before the 6/13th because that is when bpp.com ends the 170 doller presale on there mamba.