I think I get buzzed less when I'm in the center of the lane initially. When I see a car is ready to overtake me, I move to the right IF I'm sure it is safe to do so. Maybe this shows them that I'm not trying to give them a hard time, but also I'm not going to let them push me around. But, really, I almost never get buzzed anyway, so I'm not sure I'm the right one to tell you.
This guy sounds like a real hardhead. Maybe a talk with the cops will shake him up.
Did you have good lights on? You're sure he saw you before he was right on your tail?