yes, I know - re shoes - but am now agog at you in tight dress and unable to bend down!
Well, near friends is invaluable, esp if they will help you out with childcare, and are near the boys friends, too. I think it depends how you feel about space - access to a garden, access to a good park nearby. it is v important in city life with kids - esp if you are used to nipping to the beach!
Dulwich Village is v leafy, upmarket, has lots of children, the good schools are in walking distance, and good 2ndry schools on doorstep, too. But it isn't on the tube, and I think you either love it or hate it. (I'm a Brixton dweller, and go to Dulwich for little coffee-shop mini-holidays!)
I think Fulham would be great, too.