Somerville. It has everything you're looking for plus if you're on the red line it means an easy commute in to Boston. Brookline may be a more jewish neighborhood, but the commute there is awful because the green line is a bit of a pain compared to the red line. Same goes for Fenway area. If you live in Somerville you can still get to any of those areas by T or bus, but it's that morning commute that should be a key factor. Don't listen to the people telling you to live as close as possible to your work. When it comes to living there.. Southie does not have much for good T access and the rents are insane.