i am not an audiophile but for classical music, and esp full orchestras very good headphones and flacs are the order of the day. i dont think it's a good idea to to lossy compress classical music...
Classical music isn't a uniquely difficult challenge for compression and AAC at 256kbps is plenty unless you've chosen to spend countless hours teaching yourself to hear incredibly faint, inconsequential artefacts. Don't do this. It is a stupid thing to do; all you achieve is increase the likelihood of being disappointed. And it makes it more difficult to enjoy the music without instinctively listening for quality cues.
Besides, there is far more "lossy" degradation of music in having a faint source of noise in your listening environment.
Treat claims by people that they can hear the difference with scepticism. I never doubt their sincerity, but it's unbelievably easy to fool yourself with audio signals. Expectations become reality, even when the signal is identical.
Plenty of modern music has just as much—if not more—complexity in high frequencies and with stochastic noise where lossy compression tends to experience the most challenges. The main reason everyone is offering lossless now is because the bandwidth and storage saved using lossy compression is no longer meaningful if you have access to a giant pipe capable of streaming Netflix in HD for hours.
Lossless/future proofing is my primary reason for occasionally buying physical CDs, even if I just rip them and put them into a storage box.