I'm going to prepare Chateaubriand for my guess tomorrow night. Since beef tenderloin has very little fat, and fat is flavor, I'd like to introduce some additional flavor to the meal. The plan it to smoke, sous vide and sear. Will injection and/or marinade help and if so, what do you suggest they consist of? What is your favorite rub (commercial or otherwise), if any, for beef tenderloin? I want a good sear without overcooking, which one do you feel works best for tenderloin (I have torch, cast iron skillet, inferred gas, BGE and direct pit options)? Thanks for the help.