Nob Bikers if you want your opponents to hate you and your overpoweredness.
Nob Bikers should be Troops if there's a Warboss around. Even then, the unit costs well over 600 points when tricked out and is the classic deathstar. It can destroy precisely 1 unit at a time (multi-assaults are possible, so spread out and layer your defenses) and suffers against fast moving vehicles (hit on 6's FTL) and anything with a Storm Shield. Use a layered defense with fast moving vehicles, tank shock them into bad positions, and drop S8+ shots on them all day. Nob Bikers aren't hard to beat if you play it smart.Take nob bikers I have never defeat my friends ork list do to the simple fact he runs a 9 man squad of them with a warboss right down the middle of the field. (Still I have never really lost to him either since we usually kill each other off almost to the man).