What makes Carnevino unique is its obsessive pursuit of the best meat. Adam Perry Lang is a kind of meat forager for the restaurant: His job is to visit farms in the Midwest and choose specific animals for the steakhouse. At the moment, he has 15,000 pounds of beef aging in his humongous Vegas meat locker. The star of the steak menu is that pricey fiorentina for two, which by the time I visited a second time had been reduced to $145 from $160. Aged about nine weeks, it is massive, about two inches thick, and cooked without wood or mesquite to keep the flavors pure.