If you don't mind my asking- did you buy the tires from one of those chain stores or from a dedicated tire shop?

jdd has offered two great pieces of advice in his posts.

First, modern tire machines can make the wheel/tire "zero" out, meaning it'll tell the operator where to put the weights and get a "perfect" reading. But that doesn't mean the tire or wheel is round, just balanced. I've seen badly bent wheels balanced so the machine read all zeros, but it was still bent. Heck on one I'd seen the tire machine was shaking because the wheel was so bent, but it read all zeros. And it'll shake like crazy on the car.

Second, good shops constantly have their machines recalibrated. The shop that does all my work (2 sets of wheels for each BMW, 4 sets for the race car, fresh wheels and tires on the trailer) has one machine just for car alloys. They use their other three machines for SUV wheels and other wheels and tires. Big heavy SUV wheels and tires easily throw machines out of calibration.

Finally- the only way to properly tell if you have a wheel or tire problem is to have all 4 run on a Hunter Road Force 9700 machine. I places a load resembling driving on the street against the tire and spins it. Measures imperfections in the wheel and the tire, but requires that the operator know what they're doing.

BTW- several years ago I had 17" Conti Contact A/S tires on my 528. My tire shop went through 7 tires over a week to get 4 good ones that weren't out of round. Manager said he was seeing that a lot with the continental all season performance tires, to the point he told his staff not to offer them to customers any more.

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'04 E53, 4.4 Sport
'97 E39 528i
'86 911 Carrera, track car
'96 BMW R1100R