Thaw top sirloins in refrigerator overnight, remove from refrigerator, and pat dry with paper towels.
Rub grapeseed oil all over top sirloins and season very aggressively with ancho-coffee rub, pressing rub down; allow to come to room temperature for about 20 minutes.
Preheat grill to 500 degrees Fahrenheit, make sure grill grates are oiled.
Grill top sirloins 3 to 4 minutes each side, until internal temperature is 115 degrees Fahrenheit for medium-rare as per a meat thermometer. For a different steak doneness, refer to the Omaha Steaks cooking chart.
Remove from heat and rest about 6 minutes.
Slice against the grain and serve with grilled Caesar salad.