Where exactly are you thinking of buying? If you are in North Orange County, there is st Lucy's in Pomona which is a girls school that is about 20 from Brea, Yorba Linda area. ging against traffic Too!!! A real plus.
I also agree with the group that there are several excellent public High schools in our area, Brea Olinda being one of the best! Check out GreatShcools.com that wil help you out if you want to consider public!
Good Luck in your search,