Every PCB manufacturer has its strengths and weaknesses, so never rely on a single one but rather, choose a manufacturer on a per-project basis. Depending on the manufacturing constraints, the volume and the "specialities" (solder mask color, board thickness etc.) prices may greatly vary.
The best starting point is PCBShopper: http://pcbshopper.com/
Simply fill in your requirements, and PCBShopper will automatically request quotes from all the major manufacturers.
The best starting point is PCBShopper: http://pcbshopper.com/
Simply fill in your requirements, and PCBShopper will automatically request quotes from all the major manufacturers.