My 85 FSB has 380k miles and I've always done the brakes/rotors - and usually the rotors are the item that tells me I need to look at the brakes because they are warped. (I do my fair amount of stop-go freeway driving which contibutes to warping) After the rotors are turned to tolerance, I've always bought original replacements from NAPA and while they work ok, sooner or later, I need to replace because of warping. I've heard slotted/cross-drilled may be the answer to this (although at a price). Wondering if anyone has experience with these "premium" rotors? Should I buy or stay with originals?