Welcome to the forum!!! I see that you're fairly new.
Brake controllers, there are several types. 1st, the most expensive, are the types that hook up to your vehicle and know how much brake pressure you are using and applies a proportionate amount of brake pressure. The DirecLink brake controller, at over $300, fits this.
2nd type uses a sensor to determine how much you are slowing down, and to give a proportionate amount of trailer brake. The old ones used a pendulum, and the new ones use potentiometers (spelling??). The good ones are the ones made by Tekonsha, mainly the P2 and p3.
3rd type, which I would avoid, are the time based ones. These slowly give more trailer brakes the longer you hold your foot on the pedal. These are the cheapest, and I suggest not to use.
Electric vs Surge Option, I would go electric. I don't like surge brakes. There is no way to control them. As you slow down, the trailer coming into your tow vehicle activates a master cylinder and gives you some braking.
As far as using a WDH, I would go over to the ridgline forum and talk to people there. Quick google search shows people using a WDH. I think they can best answer you.
You can get anti-sway without a WDH. eTrailer.com is a great source for all of this stuff. It is basically a friction bar that helps to prevent sway.
