susaninindia - Okay here goes with "Oxon schools for girls in a nutshell" 
Dragon has much higher proportion of boys than girls. Really put me off for my daughters (though think it could have worked for my son!)
Optiond depend whether you're going to live in central-ish Oxford or out in a village.
South of Oxford;
The Manor gets the best academic results in the area, (apart from oxford high) a bit weak on some sports. Very nurturing & musical too.
Chandlings used to be great but now has inexperienced head, and it shows!
Our Lady's in Abingdon if you want something very nurturing, for a non-academic-high-flyer or child who prefers a more laid back approach academically.
In Oxford itself
Headington junior school, whilst not as strong as the great senior school, is good all-rounder school.
Oxford High is academically selective (the only girls/mixed school in the area which is), has a reputation as "hothouse" and not very nurturing/sporty but I don't know it well enough to confirm the rumours one way or the other.
Rye St Antony
Very similar to the description of Our Ladys (above).