making a paint decision
I've owned my Dart for 7 years now. It was originally a B5 Blue, but it has had a repaint at some point in time to a lighter, non Mopar blue. My intention was to go back with factory paint, but for some reason I couldn't make myself do it.
One of my favorite cars is a 1967 Chevelle, in Marina blue. I pulled the trigger on a new paint job in this color. It is a 'period correct' muscle car color, and I love it. So far we have only refinished the engine bay, but I can tell I'm going to be very happy with the final paint color.
I would also agree with what someone else suggested; keep your eyes peeled for a car that has the color that really pops for you. This is much better than looking at paint chips. Seeing an entire car painted will give you a much better idea of how it will look on your car. Go to car shows and take pics. Lots of ideas there!
Here is a picture of my engine bay done in DuPont Marina Blue: