I went with Blue Ox and no regrets. In fact though I no longer use it I still have it (It has suffered damage and thus will go to a recycler)
However There are basically 3 or 4 major tow bars
Blue-ox stows on RV
Roadmaster different models some stow on RV some on Towed. I do not like those
The brand I would get if I was buying today is Ready brute WITH Ready Brake.
Why. as someone said you need the aux brake system for the towed. this is an all in one package.
ONE CAUTION.
The ready brake uses a cable, not unlike the parkign brake cable, to apply the towed's service brakes (Primary brakes) this cable can corrode and bind. you need to either keep it well lubed or exercise it often Follow owner's manual instructions