I have to disagree about classical music being "composer's music"--I'd rather hear the Guarneri Quartet playing anything than most other quartets playing the finest the repertoire has to offer. As a matter of fact, it's with the "top shelf" pieces (which is a somewhat subjective category, of course) that I insist on hearing a "top shelf" performance.
So, as with so many things, "YMMV."
So, as with so many things, "YMMV."