Those two schools are both great because they really focus on the age groups at the school. KP has a really warm, nurturing atmosphere, just right for the K through 3-ers. KG's atmosphere is kicked up a notch, in a completely appropriate way for the 4th through 6th graders. It is a real advantage that the faculty and admin at those schools can really specialize in those age groupings.
You can't go wrong with those schools.