another vote for spatchcocking, its the only way i do it!!!! beer can chicken is much harder to get cooked evenly, not that it cant be done, though. i also like to put wooden skewers through the bird so it makes it easier to handle like this:
the only thing bad about spatchcocking is the chicken doesn't get a beer, and beer is delicious. i make up for it by drinking an extra for the bird.