From what I've been told, the Cad plated ones with poly bushings (like Mustangs Plus sells) are the best, but I've only heard of problems with cheap repros (which I'm sure the Scott Drake repros aren't).
I have the Mustang Plus cad plated with poly bushings. I've only put 100 miles on them so don't know how they will hold up. They are half the price of Ford OEM perches and about 2.5 times the cheap repops. Hopefully, they will last a long time.