Boring Topic - Suggestions for 3-5 Amer/Int School (Shanghai)

Terribly sorry, very boring "over asked" Newbie question. Can anyone recommend several decent American or Int'l schools (kids coming from the US will be entering 6th and 8th) might be easier if both were on same campus. I've read about Shanghai American School (SAS), Shanghai Comm Int'l School (SCIS), Concordia etc. Any thoughts would be most welcome. Also any thoughts on Pudong vs Puxi - Pudong seems the most "built out" as far as making a nice, slow transition until kids adapt. Cheers.