As far as supermarkets go select is going to be the cheapest cut, the difference between choice and prime a supermarket is very difficult to tell the difference other than price. The best of the best prime is usually sold to high end steak joints. You would think Celebrity would be in this category of high end steak joints and source the best of the best, but it seems the best steaks I have had on Celebrity have been at roof top grill and honestly the worst (still good, but...) was at Fine Cut.