Thats why you go single stage urethane! You can blend it, rub it out, whatever if you do sustain damage. I have sprayed Nason (budget Dupont), PPG and PPG's Urotech, an industrial version. All were easy for a garage painter and hold up really well. Shiny is where its at.
Additional thoughts: if you decide glossy, I would definitely suggest the following: 1. NOT base coat-clear coat. Single stage. 2. NOT perfect-lacquer-with-60-coats-lovingly-wet-sanded. IOW, something that looks like an original black paint job that was well cared for and then rubbed out. Slight patina, ever-so-slightly satiny. This is REALLY hard to describe in words but hopefully you understand what I am suggesting. The end result would look good, be repairable, and also not make the car look bad as minor stone chips and the like appear over time.