What about AKG K 1000? I haven't hear these, but I suppose that this open-look-style would work well at classical music. (stereo image is probably most important thing to me..) What do You think about my Sony's "headphone output" - is it crap?

Hello, Which of these headphones is best for classical music: GRADO RS-2, STAX SRS-2020 Basic System II and SENNHEISER HD-600 Any other recommendations? I use Sony xa20es - cd-player