The two main things you get from brand name paint are "gloss holdout" (how long it lasts before chalking out) and "color holdout" (how long it lasts before fading).

I have seen a red metallic GTO turn pink in 6 months! My daughter's Camaro had the clearcoat fail in one year! That is the tradeoff for using low priced paint.

I would say that ANY recognized product will give you good life, but you will find that some are easy to work with, and some are not. I use R-M and Sherwin Williams, which are both owned by the same company, a Marhyde primer, and I use X-otic Colours and House of Kolors for custom shades. After using these for about 15 years, I guarantee my work for as long as you own it.

I don't personally like Dupont since they went lead-free, and PPG took me too many hours for the finish work, but I'm sure you will find people who prefer them. Try the brands you like, and then decide if you would use them again.