Assuming you're building a 1/6 scale! What is the project?

Anyhoo I've been using these suckers for years in my larger scale warships. They're simple and robust too. I've wired motors in parallel without issue and they can handle lots of amps, up to 50A continuous according to their specs. I've also had them operate directly from a 12v lead-gel battery and they hardly even get warm.

http://www.horizonhobby.com/products/aux-PRB2314