Tellin ya.... GET THE 19's...with 275's in the back.
The magnesium is a perfect match for the SAP Auto-X grilles and rear '05 center fascia. I now have Pontiac arrow heads on the center caps tho... mutch better than the 'Drift-R' ricer logo. While I do think the black Drift-R's look good on a PBM GTO, they change the look too much for me. Everyone thinks my rims are a factory option, and that they totally make the look/stance of the car.
My $.02. I love em. Best appearance mod you can do for any GTO.