Prime Rib is very good. Lots of Fat equals lots of flavor. I would stay away from the tenderloin and filet mignon as I am a big believer that they do not have much taste. If you should get a Prime Rib get choice or prime as they have even more flavor. This is the way I cook it

I take some coarse black pepper and some chopped garlic and mix it with olive oil, I will then rub this all over the outside. I will then cook it at 200 degrees. Yes, that is 200 degrees until it reaches an internal temperature of 115 degrees. This could take as much as 6-10 hours depending on the size of the beast. But it is well worth it. Sprinkle on a little kosher salt before you slice it