We are a G Mason family and divided our kids for private public since one has severe learning disabilities that ACPS would not address. Documented but as he received tutors they suggested he didn't struggle enough to warrant help. Totally insane. Anyway.. too hard to split schools so we moved both to private.
We know plenty with families still in public however - both MS and HS. What I have to say is if your kid is "perfect" in they are well adjusted with no learning disabilities, public can work. If they are tracked for honors they should be fine.
We've looked into all the probates in the area and we didn't start with SSSAS but in hindsight I'm going to say - it's the fast choice in the area. The seamless transition moving grades will be a lifesaver - life is hard enough, keel things easy as much as possible - stay in one school

the different campuses really does help you feel it's a new experience even though new school.
SSSAS is a school that's great community wise. There's a place for you at whatever financial level you are and the kids are nice. I've never met a group of nicer sophomore boys and it's like a huge group who are friendly with one another. Keep in mind socially, every class differs so you'd experience is the luck of the draw anywhere you go. All in all, SSSAS gives you the best option if you wanted private in Alex.
We know a ton of families who opted to B Ireton and that school runs a similar block schedule and admittedly is also improved v years past. The thing is I would never send my kids to Catholic school it's a cultural thing where they wouldn't be happy

we are just not into that much religion but SSSAS runs chapel weekly and a huge service oriented culture - you can't graduate from HS without 40 hrs volunteer work prior to senior year- that's as good as we can hope without actual Catholic school

if you are open though, look at both schools.
Ultimately I do think that through grade 4, public is fine. It's really starting 5th that you should consider pvt. And to the pp - I personally know ACDS families who were not accepted into SSSAS so no, they do not in fact accept everyone. This family is good friends with us so I know they had a kid who was a fairly strong applicant.