What can a ATH-M50 user can expect from upgrade? I'm currently, very happy with my music coming out of M50 from iPad. To my ears, it's at least matching Harman-Kardon system I used to have, although not quite to the level of Rotel and B&W that I have.
I'm planning on upgrading to Little Dot DAC and MKIVSE plus either AD900 or HD600. That's easily additional grand in cost. So, in practice, what kind of improvements can I expect out of this setup compared to what I have?
I listen to classical, new age, acoustics, and some pop musics mixed in. I like M50's bass and low mid-range, although I'm no basshead. While I appreciate detail, soundstage is important to me; hence I love my livingroom setup: airy B&W sound.