One thing you'll quickly find out about electrics is that there is no one "best" anything. Competition, and passion for the hobby, has netted us a field of first-rate vendors, and first-rate products that make it very difficult to go wrong no matter what you choose. That's not to say you can just slap any motor and battery in any plane, and expect spectacular results. What I mean is that once you figure out how to match plane to battery to motor to gearbox to propeller, you won't have to spend countless sleepless nights worrying about who to buy it from, or which brand to buy.

FWIW, it never hurts to cut your teeth on a GWS foamie. Slow Sticks and Tiger Moths make great large-backyard flyers. They're cheap, and GWS markets flight packs specifically made for their planes, so you can see what goes into an electric plane.