The only real correlation in the exam results league table is the less deprivation the better the results.
Just because some children are sent to different schools doesn’t mean it would have any effect on the children who aren’t.
You’re also making a massive assumption that children who get sent to private schools are more capable than those who don’t, why would child 1 who was sent to George Watson’s automatically achieve more than child 2 who was sent to Firrhill if they both went to the same school and all other factors (stable home, supportive parents) are the same?
In my experience of private schools many of the parents send their children there because they need extra support that they might not get a state school, whether through SEN or academic reasons, these are likely to be children who would struggle at state due to lack of resources so it wouldn’t be the boost to exam results that you think.
As for the area, the reality is that with the OP’s requirement of a 3 bedroom house with a driveway and the current state of the housing market in Edinburgh he would be looking at properties at o/o circa £275-280k.
Which means he would be looking at areas like Gilmerton/Liberton/The Inch, nothing wrong with living in these areas but given some of the earlier comments made on the thread about crime rates and the like in Livingston I’m not entirely sure they would be an improvement on that.
Ultimately the choice would be either a safe, affluent area with a decent possibly 4 bedroom house in Livingston or an inner-city house in a deprived area with all the issues that would bring, just so he can have an Edinburgh postcode and get into town 10 mins quicker.
Livingston suffers from a lot of snobbery because it was a new town, exactly the same as East Kilbride does in the west.
Primarily it’s because it originally housed the slum/tenement clearance population from Edinburgh/Glasgow.
But that was over 60 years ago, the population as a whole has moved on since then and poverty at the level of the 50’s/60’s is a thing of the past.
Most of the new estates are populated by Edinburgh/Glasgow professionals who have been priced out of the cities and want a good spacious childhood for their kids.
Obviously it’s not perfect but I find it laughable that people can portray it as crime-ridden, especially when compared to the feral gangs in parts of Edinburgh.
Amenity wise it’s better than most of the towns in Scotland and is within commuting distance of the town major cities.