Ronaldo, I'm astounded that you think your lifestyle, as you describe it, marks you out as different in any way.
I teach plenty of bilingual kids, who often travel to other countries, and I'm in a bog standard comp. DH and I both went to state schools, yet we have a study, plenty of books and own two cars
Also, my DTDs (aged 6) play the piano and have been to the theatre on a number of occasions. They are charming and polite.
On the subject of the thread, I live in a town which has a state grammar so well regarded that people will travel across 2 counties to get their DCs to it. It's ridiculous. I say change the system. Get rid of the remaining grammar schools and create a true comprehensive system. The government needs to invest in all schools. Academies and free schools can go too.