You CANNOT go by what someone says on the internet when it comes to paint. Your best bet, call a dealer and ask them! If the dealer doesn't do it themselves, they should be able to tell you what shop they use.
If you can, ask around in the local car community. See where owners of rare/classic/show cars go and get their feedback. There are no set 'rules' for picking a good shop out of the crowd; it could be the biggest and fanciest shop in town or it could also be the low-key, small shop around the corner that's a bit of a well-kept secret.