How can I choose the PN for my son

My son is a small baby since he was borned on Oct,2008. And now he has two offers from the Boxhill (TKO) am class and pm Yew Chung (Kowloon Tong). I am so confusing that because Kingstons is my target school but the waiting list is too long for my baby.

So that I am planing to send him into an international nursery for a year after that send him to Kingstons as a repeat student in PN class(Big Boy)............

For my case, does anyone can give me some suggestion on the selection of school? Boxhill or Yew Chung???

THX a LOT~~