Motor and ESC Selection for a Jugg2???

[Neo_Alaska]

Hello everyone. I'm new to RC and the forums. I've just started my first project, a Jugg2 that I picked up off of Ebay. At the moment I think I got everything I need except I'm having trouble deciding what motor/esc combo to go with. I know I want to go brushless and I plan on picking up two A123 Racing Hypersonic 4600 6.6v for batteries.
My question is: What would you all recommend for a motor and esc? Based on what I've read on the forums I was thinking a Mamba Max ESC but I have no ideas on motors or pinion gears.
This is going to be a backyard basher and I would be happy with speeds of 20 to 25 mph.
Any recommendations?

Thanks!!!