I was looking for the "best" or better than OE so I looked for better than OE quality rotors, those blanks they sell are of the same quality as a premium rotor from the parts store but with zinc coating.

The slotted non drilled front/rear combo with zinc coating I found was $375 through them, didn't see a ebay listing on them but I'm not digging for them.

He has his options that's for sure. The buick rotors with painted caps and coating are like 40-50 a rotor online, then add pads. R1's are an option or even powerstops are having a sale on rockauto for the buick fronts, they are just over $100 for fronts only with pads. I ran powerstops on my silverado and they held up good.

OE drilled rotors for the GXP are 60-70 each from AC delco before shipping on rock auto, I know for sure the parts store rotors cost way more than that. I'd stay away from the drilled rotors though.