Max Townshend and Andreas Koch both feel that RCA's have more "pure sound" due to the additional circuitry of XLR's. So unless someone is going for long distance cables, I think good RCA's are better. I swapped out all my XLR's for Townshend F-1 Fractal RCA's.
Some components like Jeff Rowland's new amps only have XLR inputs. So the decision is made for all.