The standard ESC only accepts maybe 4 servos and a 3cell LiPo. The Pro accepts up to 7 servos, I think and many more LiPo cells. If you were to use more than the recommended servos and LiPo's with the standard ESC, you have to use a separate BEC. Castle Creations makes a really good one. Your possible choice of the 60 is a good one. I like to use an ESC that is more than the one recommended as they run cooler. I have two 60's running now and they are flawless.