A good target for any music, including classical music is neutral. This equates to flat when measured at a 1m distance with the microphone aligned to the tweeter. Or if at the listening position, the B&K curve per their 1970AES paper. The flat target at 1m usually translates to something looking like the B&K curve in a normal listening room (meaning with furniture, tables, soft, window treatments, rugs, bookshelves, not a rape dungeon that requires professional acoustic room treatments.) Just because 80% of classical music from Decca, EMI, Philps, L'Oiseau-Lyre, etc. (most of my stuff was purchased in the 80s and 90s) follows the typical classical mastering job of "midrange-city", doesn't mean that I am willing to sacrifice the all my other music including classical records which I considered to be mastered more correctly. A good portion of my classical was redone by @LFF. I don't believe in using colored transducers to undo the effects of bad mastering because the consequences are worse for all other recordings.