Actually, I would go for a used Stax with an energizer, if you have an amplifier at home anyway. You may have to shell out a bit more than 200, but detail, speed and natural sounding soundprind in spades. Simply, the best option, according to my experience, for classical music. Not even the mighty HD800 comes close to an old stax in fidelity of timbre, details and speed (microdynamism).
I initially wanted an electrostatic, but it's simply not in my price range. I can't find a pair of Stax for less than $400, and that's not even counting the cost of the energizer and amplifier. That's going to have to come later down the road :)