What brand of Paint do you guys recommend?

[orange72sub]

I have a 72 burb with original paint from AZ I am not stripping it and I am painting it the stock orange and white. The carpaints sales people said I should just scuff and spray with their single stage chrome a base. It is a dupont series of paint. They quoted a gallon of orange and a quart of white they said with thinners and activators and everything it would cost me $650. They said I would n't need to prime the whole truck just spot prime where I repair and sand through to bare metal. I need to paint the door jams and the inside of the doors. Does this sound like enough paint to do the job or will I need more? Should I really paint with out priming the whole truck? I also plan on replacing the front fenders with new so they will be black will that be noticeable if I don't at least prime them in a red primer? Any suggestions will be much appreciated! Thanks