Roadmaster, Blue OX and Ready Brake make excellent products. I use Roadmaster Brackets/Base Plates, Blue Ox Aventa Tow Bar and the Ready Brake. All work well in concert with each other.
I just recently purchased Roadmaster baseplates and tow bar adapter (Blue Ox Towbar to Roadmaster Base plates) I would recommend paging through a recent thread I had running in the "Dinghy Towing" forum with regard to a couple of online dealers that you might want to avoid.
roadmaster-tow-bars.comNote that roadmaster-tow-bars.com is not Roadmaster Inc., the manufacturer of Roadmaster products, but rather one of many dealers that sell their products. When going through the above thread link, several forum members have posted other recommended places from which to order Roadmaster products online, if you don't have a dealer near you.