Suspension will rarely cause a speed sensitive vibration. Rotating mass causes speed sensitive vibrations. A few quick questions please.
How many miles are on your car?
What wheel and tire package are you running?
Has the car been in any type of collision? Kissed a curb? Gone off road at a track?
Has a run-out check been done on the wheel, rotor and hub separately and as a completed assembly?
Is t the same shop that has road forced both sets of wheels and tires?