Who makes good paint?

Unless you are a professional painter you'll probably never really notice any differences between any good base/clear line of paint. All reputable paint companies have their ups and downs but like I stated most amateur painters couldn't tell you the difference. Also most paints are meant for PRODUCTION not complete paint jobs. This will mostly be noticed with clear coats. Also most production clears are not going to look "restoration" quality when done. They are made to have orange peel to match factory texture (oem finishes suck) and be for small panel amounts like 2-3 on average.

When it comes to economy paint lines like Omni you will want to watch the amount of product you need... I've found with omni the colors are very transparent because the toners they use do not have the pigments of a higher line paint. This translates to you using double the amount of product negating the cost "savings"

If you decide on a solid color a single stage paint can be a good economical choice but remember repairability is more difficult. For an amateur paints base/clear systems are easiest to use.

Some of the best paint systems I've used include

Glasurit
RM
PPG DBC
Spies Hecker
Sikkens

A lot of paint products now are under the umbrella Axalta (Spies,Dupont)