Which brushless motors to get?

[hyperasus]

I have 2 Warrior 9920 controllers. I bought 3 3cell lipos from maxamps(the 6000mah).

Question 1: Which BK motor should I buy to go with my rustler and a 3cell lipo? The rustler has stampede size tires on it.(probably even going to get the adapters so I can run revo tires on my rusty)

Question 2: Which BK motor should I get for my e-revo and 2 3cell lipos, so I need a motor that will go well with 6cell lipo.

I will be bashing both of these trucks pretty hard so I need something that isnt going to overheat when I run them hard and fast.

Also could someone tell me the difference between the 9920 and the 12020 controllers? I would gladly pay the price difference for the 12020 if it ran a little cooler.