Be prepared to spend $8-10k for a complete repaint including door jams and compartment interiors. You didn't mention if you're changing color.
Dupont and PPG both make excellent quality paints, but any shop that does this on high end cars will be using a good paint. The real quality is in the preparation and application, even more so than in the materials themselves.
A really good paint job will include stripping off all of the existing paint and starting from base metal with compatible primers and fillers. They'll put on several coats of clear and color (wet) sand and polish until the car is a colored mirror.
When you look at shops, insist on seeing the work they've done on other cars and have them step you through their process. After you go through a few shops, you'll get an idea of who's really putting the effort in and who isn't.
By the way, some of the most impressive painters I've found work out of small garages at their homes.
Check out the two attached pictures. The Rx-7 has a pretty decent paint job, it was about $8k several years ago. The reflection of the Boxster in the Rx-7 is pretty clear and smooth.
Now look at the Rx-7 in the Boxster and see how wavy it is. The Boxster is the factory job.
