Hoa Viet, with a coupla locations in both Stockton and throughout Sacramento, serves the cleanest, purest, simplest and best pho in the central valley. In addition to the usual sprouts and thai basil, they often add sawleaf (or at least that's what my friends call it - anyone know the real name?), finely sliced shallot, and those tiny chilis that the Thai call "mouse shit peppers." Even Bob likes it! The duck noodle soup is good too, but of course it's not pho.
Thanks to Chowhound.com!