Single stage VS Base/Clear

[BillyBobL71]

Painting my 69 very soon a solid black, and my painter is recommending a Single stage urethane, as touch ups will be easier down the road. Says it'll look just as good as base/clear. Would like the opinion from some of you guys with experience using both. As much as I'm paying for this, I want to get it right, and would value your 2 cents.

Plus, I here a lot of talk about brands, is there really a difference in high end paint brands? He likes to use Du Pont chroma premiere.

Billy (soon to be black) Bob