I second the idea of getting a lawyer. The difference between states supporting IEP's is absolutely amazing. One state will be wonderful, and then another will be awful. The trouble with the lawyer concept is that it may take FOREVER to get what your son needs. You have to weigh that against maybe possibly homeschooling as an alternative.
We were in California when my son was just diagnosed and in kindergarten. We fought all year long, without a lawyer, but with advocates, etc. We thought we were getting somewhere, but when it came down to things, our son would not have been in regular ed, he would have been put with a class with a multitude of different diagnoses, i.e., speech impediments, blind, deaf, lower IQ, etc. One or maybe two teachers for fifteen kids all with different diagnoses. We decided to move to a state that would be more accomodating, and we've never looked back. My son is going into high school, and we are STILL fighting for an appropriate education -- but he's in regular ed and doing relatively well, and college bound.
Again, I wish you luck with your work on this IEP situation.