SwitchedOn, I am presuming that when you were looking your DS was looking at reception entry?
We had the same dilemma at this age, could not get place at nearest state primary as so sought after, ended up only option was a really grim undersubscribed primary 6 miles away.
At that stage we went private, DD ended up at a top selective girls prep.
However, when considering senior schools it became clear we would only be able to keep both DCs at private by selling our house and moving into a small flat. But we really don't want to do that, we like living here, the house is part of our security for retirement etc.
So we decided to go with the local excellent girls comp. Lots of good feedback from neighbours, friends. DD has developed a great atttitude to learning at her prep and should easily gain a place in the express stream at the comp which will be full of girls with a similar hard working attitude.
Plus, it is within walking distance and free!
The decision was hard to take but I am sure DD will thrive and after working hard for many years we are just not prepared to throw away our financial security and spend our retirement in poverty just to chase the dubious advantages that private secondary may or may not bring to DD.
Some MNers will no doubt call me a selfish, bad mother but I think there have to be limits!
DD is no doubt in a very good position having had the grounding at prep and i cannot now see her losing that, even if the comp she was going to was very average.
I went to a below average comp myself but I gravitated towards others who wanted to work hard and consequently got a good education. I am sure DD will do this. And you are right, family background and encouragement is the most crucial factor in academic success.
The decision was hard to make, as DD loves her prep, but now it is made I feel so much happier. The release from constant financial stress is wonderful.