I owned the HD 598 for two years. Then I got the HD 650, and the imaging was spectacular. But because of not-so-wide soundstage, music always sounded messy to me. Also, I missed the treble of HD 598. I got rid of everything, and then got M50x. While it performs well, I never seem to enjoy music as much as I did with HD 598. I have been reading up on HD 600, and the reviews suggest they have better treble than HD 650. Now for a person who enjoyed HD 598 a lot, but did not appreciate its mediocre imaging, would you recommend the HD 600? I mostly listen to classical music, movie soundtracks, 70s/ 80s rock. Thanks.