This happens to be one of the best unknown new schools in the U.S. http://www.geminischool.com/ it used to be located in london and was very prestidgious.
A good friend and the founder Rodger Barcilon has been teaching for over 2 decades and working Professionally for 4 decades and decided to move the school to TEXAS.
What makes this school special? The work of his students says it all, just check out his site. Another good point is his school is a four year school, whats great about that? well your fourth year you will be working on actual illustration jobs! and he has a top notch group of illustrators that work there too and teach while doing thier own work in the same studio.
I cannot say enough except enroll quick!!! He allows no more than 20 students a year!