Music first or sound first?

Music.

I can enjoy great music on a lousy system, but I prefer a great system, and I am blessed to have one--and blessed that it was less than $50k all-in.  I am also blessed to not have fallen prey to the perpetual dissatisfaction that can be a part of the experience for those who are drawn to great reproduction, though I can certainly sympathize with it.

I was beguiled in my high-school years (late 70s) by ads from Marvin Electronics in Ft. Worth, Texas.  I still recall their ultimate system consisting of Macintosh electronics, Studer Revox RTR, a Gale turntable, and Dayton-Wright electrostatic loudspeakers...So I have a pretty deep legacy of interest in the highest end, which has always been (sometimes slightly, sometimes greatly) beyond my financial reach.

The sound of music.

@Larsman   +1.   Looking at the other side,  what good is a great stereo if you don't play music that you like?  

to chose between the two seems silly, they go hand in hand

A synergistic interaction between the two goes on, each driving my desire at different times.