So my first purchase that led me into "audiophilism" was the Shure se215. I loved them and loved the base heavy, but otherwise transparent, sound and clarity of the mids and highs. Now my question is what should I reach for next that is still an IEM (they tend to have more accurate, clearer and more controlled sound compared to headphones) and has relatively the same signature as the se215s but better?
In my search I have constantly stumbled into reviews of the Westone 4s, the se425s, se535s, seen IE80s, and a couple others. Are any of these or others that you guys know of a good upgrade? I have a budget of about $500 but I am also interested in good value for money.
Also, if there are any headphones that would be a good replacement for the se215s let me know. I am considering buying the ATH M50s... are these good?