I have the B&M IQ-X and Toplight Line Brake Plus on my road bike. I find the headlight more than adequate for brightness and beam pattern. I have it mounted on a left-side V-brake post because my fork does not have a hole through the crown .
The tail light is nicely visible, according to riding companions, and it has a "brake light" function which I find interesting. A microprocessor monitors the frequency of the dynohub's output, which is proportional to speed, and when the frequency drops suddenly, as when braking occurs, the light brightens up.
In addition, I ride with a battery-powered headlight and tail light, just in case, and also to supplement the B&M equipment on very dark roads.