I don't know about the other shops, but my car was painted at the Sprayglo in Atlanta and they really hooked me up. The car looks great and they're even going to get rid of a lil overspray from a previous paint job for free.
I'd give them about a 9 out of 10, because it was close to 100%, but not perfect. The color looks awesome... It's Porsche Arctic Silver. Shiny as hell and very deep. The only problem is something (looks like a hair or a small leaf stem) blew into the paint in one area. Also, If you look closely at the rear corner of the car (which they repaired) the lines of the trunk/taillight area are off ever so slightly, but I'm a little anal when it comes to details on the car. I dunno if it's show quality, but still damn good considering I paid less than half of what every other shop was quoting me.
I'm going to post pics once I can get ahold of a camera.