That's a popular Head-fi recommendation, as well as their sibling the KSC-75 (same drivers). The great thing about headphone audio nowadays (as opposed to just

That's a popular Head-fi recommendation, as well as their sibling the KSC-75 (same drivers). The great thing about headphone audio nowadays (as opposed to just 10 years ago) is there are quite a few low cost options that sound great. Unfortunately they're not well known unless you do some research. That said, if you want top-tier audio out of something extremely portable that isolates to a degree, I cannot recommend Sennheiser's IE800 highly enough. I've spent many a kilobuck over the past 15 years and these are some of my favs. Not cheap at $800 retail (used in the $500-600 area), but totally worth it if you listen often while working. I have other IEMs that cost 2-3x as much and prefer these. Most of time I use these in conjunction w/ Roon audio player and a Tidal sub straight out of the headphone port of my 13 rMBP - total audiophile bliss.