Yamahas came today, haven't gotten a chance to listen yet, but should pull it out later and listen. I have to collect my impressions on the Mikros 90, listen when I have some time and sort it out, but I do really like them. Looking at the thread dedicated to them, they seem to inspire love or hate-people don't have middling feelings about them for the most part. As I mentioned, they behave a bit like a finicky iem that's difficult to fit in that, put on the wrong way, the bass is MIA and things sound thin. Someone even posted the "proper" way to put them on for good fit (put them in front of your ears, then slide them back until they cover the body of your ear). Sounds silly, but, know what? That made a major difference in sound for me, and I do really like them. The way I see it, they started about $300 list, are made by a major audiophile speaker company, and are now selling for $60-$80 (Newegg regularly has them in this range). At this price, seems like a no brainer to give em a try (again, some people seem to hate them, but the investment isn't all that great). I will try to do a round up of the different on ears I've been accumulating.