The Bose 35’s are great NC cans for travel and now home quarantine when the “others” become just too much... I recently tried IEM’s on a long flight, isolation and SQ is great, comfort not so much for hours & hours. Over-ear cans beat IEM’s in comfort long term, unless custom maybe; no experience with custom just reviews... keep the 35’s unless you need the $, though more of a value to keep. What is your budget for moving up in headphones? You really want to look at a setup, if you are now plugging into a pc and/or phone.