I went with Blue Ox baseplates, a Roadmaster Falcon All-terrain tow bar and the SMI Stay-In-Play brake controller. So, everybody got a little money.
I just went with a reputable brand and wherever I could get the best price. I picked up the tow bar and brake system used, but bought brand new base plates. As long as you stick with a major player, you'll probably do just fine. But you can mix n match as long as you do a little homework.