Magic tends to be hyper-vigilant and, as such, he will often raise his head as high as it will go. When I talk about lowering his head, I do not mean teaching him to carry his head really low like you see some quarter horse Western Pleasure show horses. I am looking for a natural, relaxed head carriage.
Different breeds and different horses within a breed will carry themselves differently. Arabians tend to be more "high headed." Quarter Horses tend to have a lower head set. Piper, a Tennessee Walker, tends to have a higher head set. I really don't really care exactly how high or low the head is. The important part is that the horse looks relaxed and calm.
Watch your horse in the pasture with his buddies when they are just hanging out. Where is your horse's head? That is the head set I want to see when I am working with a horse.