Need Help picking new Brushless System

Hey guys, I just sold a bunch of stuff on eBay to get some funds for my new brushless setup. I'm pretty set on going with a Feigao 9xL motor and the BK Electronics 12020 Warrior. I have two concerns.

1. Is the Lehner 1940 brushless motor for $285 a good motor or should I just stick with the Feigao?

2. I will be running a G-Maxx single speed tranny with stock gears, how will it hold up to the power? I am not able to locate any aluminum tranny gears anywhere. Does anyone know where to get them?

Thanks again for all your help. I should have pictures up soon of what I hope to be "masterpiece" lol