Cordelia, Green Valley and Rancho Solano are nice communities to the northern side of Fairfield.
Cordelia can be very windy should you decide to relocate there. Just 10 minutes away in Green/Suisun Valley you will find a small microclimate similar to weather in Napa except less Fog in winter. There is no noise that I am aware of from the trains. Occasionally you see airplanes from Travis flying over and typically they are high enough there is no noise. This area off Highway 80 is a great location for commuting to SF/East Bay or Marin.