I have Massdrop Noble X currently, and looking for an upgrade. Major points, in no particular order: * Budget: 1000 EUR, including VAT. * A bit better bass and particularly treble extension than the Noble X. * Natural and engaging signature, not too dissimilar to the Noble X - I quite like their warm-ish tone. * COMFORT, comfort, comfort!!! The main reason to upgrade is the Noble universal shell. * Improved clarity compared to the Noble X. Sometimes it feels a bit veiled. * I have a feeling that BA IEMs (at least Etys and Noble X) sound somewhat unnatural or artificial, though they might just be well resolving... Would prefer (not require) a single DD. * Music genres: 80% classical (all of solo, chamber, and orchestral), 20% progressive rock (think Dream Theater). * Being blessed with living in a city that hosts three world class orchestras, I'm a frequent visitor to concerts. When there are seven double basses playing Forte just a few meters in front of me, well, the IEM should at least try to reproduce it (so "flat” things ala Etys are utterly out of question). * Cable with a mike, and the option to do frequent calls (up to 6 hours a day). From my research, Beyerdynamic Xelento sounds like it would check all the boxes. With IE800s, there's the danger of poor fit and microphonic cable, and the sound is not quite there, either. Dita Audio The Answer - maybe that one? IMR R1? Any other ideas? Maybe some CIEM because comfort is huge for me?