Well, I only have 3 different dealers of auto parts where I live...
Autozone: OK, but you have to know what you want before you go in there cuz their employees dont know crap about cars.
Pep Boys: They NEVER have parts instock so you have to special order them. They are also expensive.
Hi-Lo: They have a knowledgable staff (if you talk to the right person), but they are slow getting to you if you need something behind the counter.
They all have their ups and downs (some more then others
). I order most of my stuff from Summit, but for little stuff like spark plugs and oil, I usually get them from Hi-Lo.