ive tried both the 1/10 e-revo and e-maxx. being more of a basher and speed runner, the e-revo seemed easier to control for the wild speed-runs and jumps, also it was noticeably faster but it all depends on what you like to do. i dont race so i chose to buy the smaller 1/16 e-revo because it was a convenient size. most brushless motors are water-resistant/waterproof the thing you have to make sure of is the esc and batteries. hope this answers at least one of your questions.