i will start off by saying that for the 150$ price these cant be beat. the ath m50s may beat it but thats the only headphone that comes close. the bass is very realistsic and not boomy. it has a very good frequency response. and it can be driven without an amp. people i think we have a winner. also if you have the shure srh550dj headphones when tehy come out feel free to let us know what you think of them in this thread.