Vietnamese in the East Bay
When you say local, I'm assuming you mean you don't want to drive to Oakland. I don't know about the area south of you, but the closest good Vietnamese north of you is in Concord:
Pho Hoa Hiep
1833 Willow Pass Rd
Phone: (925) 677-2131
This is a branch of the one in Oakland, and it has very good pho, also good bunh, and good fruit shakes, w/ or w/o pearls.
Another good one, although the pho is not as good as above, is in Pleasant Hill:
Pho Hoa-Phat I
508 Contra Costa Blvd
Pleasant Hill, CA
A nice thing about the Pleasant Hill restaurant is that it is in the same mall as the best Asian grocery in the area.