2003 Honda Accord 2003 Accord - Vibration in Steering Wheel

I recently had new rotors/pads installed on the front end and rotors turned and new pads on the back end. At the same time, new Michelins were installed all the way around. The tires were road-force balanced to within 5 (I think spec is somewhere around 10+). The problem I have is a vibration in the steering wheel that starts at around 41-42mph and is fairly consistent through 80+. At @ 65mph, the vibration hits the entire cabin in a harmonic type vibration (kinda like rolling down the rear windows only when going down the interstate, but not as severe). The car stops smoothly, so my question is, could this be a bad rotor? Not a warped rotor, but an out of balance rotor? I am stumped on this one and so is my mechanic. The car was put on a lift and all bearings and joints were inspected and are solid. The vibration was not there prior to the new brakes and tires. Any thoughts on this?