First - TAKE A DEEP BREATH.
Nothing has magically changed since you got his RIAS scores. He's the exact same child. I certainly wouldn't begin to plan uprooting your family over this.
Does your child enjoy his current school? Is he having behavior problems of any sort?
Honestly, I don't want this to come out wrong, but he can't even read yet, I'd slow way down on the planning side of things. Personally, I'd continue where he is, unless there's some issue you didn't mention here, and plan on having him re-tested around age 6.
