ITP; Westminster, got it, you are Buckhead adjacent: Brookhaven; Paces Ferry; Vinings? Fulton county, not DeKalb county. You stated that Woodward was out as it was across town. And we know the commute in ATL is EPIC! Probably not seriously considering going any where else. Is this about right? Close?
Our experience, being pre-annexation Chamblee (DeKalb) was that the K-5 was okay, 6-8 was a bit dicer, and we busted a move to Colorado before HS. While Chamblee Charter High is a fine school. More precisely, it is a fine one for Atlanta. We had every parent constantly giving us unsolicited advice to to the kids to Marist, and that it was much better than the public school was. At PTA, the Kroger, walking around the neighborhood (Sexton Hills). Fun thing about that though, when one pulls the CRCT results, Marist did not do better than CCHS. I believe Pius did not either. At least when we were living in ATL.
Unpacking it a bit more. Privates are social institutions. Certainly they teach classes, however, they serve to establish a social strata of those that are, "better." That is the driving priority. Hey, you do not have to agree. I get it. And they are pay to play. Westminster is going to cost more that a top state Uni, and at least half of what most Ivy's charge: $37K/year! Clearly, I need a better job.
Next, the Christian School question. Yes, Westminster absolutely is. While they do not have it slapped across their website landing page, it is trivial to find from the 'About Us' page, . As well, if one takes the time to read XC Coach Tribbles 2020 , he does pepper his conversation with a decent amount of his Christian beliefs. He is probably one of the reason you want/are going there, and hence why you thought to post this on Let's Run, as you are a runner, or runner adjacent. So, stop with the whole are they or are they not BS. Those that attend there will have the expectation to participate with all that goes with a profession of faith.
That said, we stayed public, 2 of the children are out of college and working, one is getting a PhD at an Ivy (they pay them to attend), and one is a D1 runner. So public can work, and the education issue in Atlanta is shot through not just the public's, but many of the privates as well. Our experience was that privates were mostly a form of segregation, I mean, it is the South after all... Not just racial, but income as well.
Here is hoping it works out well for you guys.