<font color=blue>What about surge brakes?</font color=blue>
Personal opinion? They're better'n nuthin, I guess, but I'd go with electric brakes and put a controller on the tow car. The only times I can recall seeing, or using, surge brakes is on rental trailers (because the folks who rent them may not have a brake controller on their tow car) and heavy boat trailers (because they're going to be backed into water and that wouldn't be good for electric brakes).