If it's just one then either the early 70s Mach I or the fastback. This one has a 429 cobra. The Boss is the ideal but is waaaaaaay up there in price. Third would be the coupe, and it has the best grille IMO. But isn't considered muscle. The coupes have gone up in demand driving the prices up because the fastbacks and machs are much more rare. Johnny Depp had one in 21 Jump Street. It was blue and think that was a fastback but can't remember. It got destroyed at his home in the Hollywood Hills due to an earthquake I believe.