As a former teacher I feel I can answer this question. As a realtor I cannot rate one system over another. Now that being said ,I can tell you we could have choosen to live anywhere in lower Westchester. We decided on Pelham because of the schools. My daughters are 6 years apart. When the older girl went through the Pelham system it was very strong, especially the JHS. My younger daughter's experience was superior.I could not have been more pleased. This was a child who worked hard at trying to fall between the cracks. The staff would not allow it. She was not an outstanding student in secondary school.However, she now has a BS,BA and masters . She has also has done three fellowships at Yale.
This has been my experience with the Pelham schools.But as a parent,teacher and realtor my advice is to go and visit each JHS. Look over the schools and decide which system fits the needs of your children. All of the systems you have named are good ,but you must see them yourself to decide where your children will be most comfortable and best served.
Let me know if I can assist you in any way