Well some of the friendliest people I've ever met in Zurich live on Seefeldstrasse - albeit further down, more towards Hoschgasse-Wildbachstrasse side.

For commuting times - check: http://www.zvv.ch

It's the local public transport page for Zurich and if you have an address or a stop, you can just enter it to see how long the commute takes.

Enge is nice as is Kreis 7 for families. A friend I knew who has two kids, specifically wanted to live in the (nr bellevue) so that when they do go out, they're never far away from the kids. It's another way of looking at things