At the risk of offending anyone who uses studio monitors, many of them are far afield from accurate reproduction. Most studio monitors are durable and well built. Although I sold lots of brands of studio monitors in my hi-fi career, there was always something in our store that had a better tonal balance and/or better imaging.
Although classical music is less than 10% of my listening, I've often recommended to evaluate speakers with classical music, because it's (nearly always) acoustically created music. Processed and/or electronically amplified music isn't acoustically accurate or natural to begin with. OK, most of what I listen to isn't acoustic instrumentation. Still, if speakers can reproduce instruments' natural sound, they will do a wonderful job on electronically altered sounds, as well. The reverse is usually not true.
Although it's not the majority of what I listen to, I know what classical music should sound like live. For many years, under both Solti and Barenboim, I was a season subscriber to the Chicago Symphony Orchestra.