The RHA set are extremely good, although as per a couple of reviews, they take a while to bed in and can sound drastically different and vastly improved once they have.
There's detail in some of my flac files that I've not heard for a long time and they're overall the best set I've had in years.
If you ever have to deal with warranty on them, they're excellent there too. Had a new set of the 450i after they decided to not work with my iPad any more, arrived in a couple of days after diagnosing and dealing with RHA directly.