I was recently directed to a great post by photographer, Wendy White. She discusses why it's important to have your photos printed at a professional print lab, such as Mpix.
Mpix is a great public option for clients because you receive great quality prints. You don't receive the same quality if you go to Target, Walmart, etc., and Wendy's blog post shows examples from different print places. She also mentions Millers Professional Printing, which is the print vendor that I use. So when you receive prints from me, you'll know that the quality is superb!