Since "marginal gains" are irrelevant to most of us, keep experimenting until you find that sweet spot. Feels fast, comfortable, no pinch flats.

Yup, I remember running 20mm tires at 110psi....but now have settled into 25mm Conti 5000's at 85-90psi. Seems like a good compromise. It just bothers me to look down and see a deformed tire.....just does.