I've had the R-50s for over a month now and I'm not quite sure how I feel about them. I'd describe them as bass light, and extremely bright. Trumpets in my jazz songs often make me want to quickly pull my R-50s out of my ears! The highs are piercing! On Paramore's live album "The FInal Riot!" The Ss come through as an almost hissing sound and far too high-pitched. Now, all of what I have said above is in reference to my ATH-M50S, ATH-M35, home theatre system, and big Mackie speakers at school on which the album sounds good unlike the R-50s. The album is in FLAC, so the problem isn't because of lossy compression. I was going to write a full review, but they're already mentioned on Head-Fi and people seem to be slightly aware of them.
I don't think I would buy them again because of their ear-shattering highs.