1515 1y/f & Quark 125b... What to build?

So I think I have everything for my project. So far I have:

1515 1y/f
Quark 125b
Quark Heatsink
2x 40mm Fans
RC Monster rc8 Mount
14 & 15 tooth mod-1 5mm pinions

I am going to purchase the rc8 from my LHS this weekend and order the 4s 6000 Lipo. Is there anything else I am missing? Do I need an external BEC with the Quark?

I also need to pick up the bullet connectors as well for motor and ESC. Will the Traxxas connectors handle 4s or do I need another type of connector for the battery to the ESC?

God knows I can't afford this car, but this stuff is like crack.