The Holmes ESC also has what's known as Holmes Hold in addition to drag break. It's like drag brake on steroids, and will not let the rig move on steep rock. If you plan to do a lot of crawling, it's a nice feature to have. The Holmes stuff isn't cheap, but it's very well made, and JRH will waterproof it for you if you wish also. I have a de-cased BR-XL in my comp rig and love it.