J30 front rotor problems

I am on my second set of front rotors with less than 10,000 between
intervals on my '93 J30 with 84,000. The car's steering wheel shakes
when applying the brakes at both high and low speeds. I have used both
aftermarket and factory (infiniti) rotors, both failed after 6000
miles. I am easy on the brakes and the car is carefully maintained.

Any suggestions: change rotors again using Brembo or another brand?
Change front pads and rotors. It's a great car, but this brake thing
is getting old.

Any help would be appreciated.

Thanks,

RJ

what brand did you use aftermarket? i've used speedy dynamic for over 6k miles and no problems... (and they were bought off eBay for christ sakes) knock on wood :)