Our choice for high schools was 100% related to academics. We moved to a neighborhood that was zoned to the best academic high school in our area when my son was 6, long before Baseball was a consideration.
To the original poster: what are your son's longterm goals with Baseball? Does he love working on the game 6-7 days a week? In many parts of the country High School Baseball is either completely irrelevent or nearing irrelevancy, just glorified rec ball.