I went to A&B sound(big store out where i live) and listend to over 20 differnt models ranging from 50$-400$, some i liked for one reason some for others, the koss were the middle ground in my price range so i got them, the sony's were ok but had weak bass and awesome mids, the koss had killer bass and so-so mids. The senn 500 series was great but a little expensive, and sounded a little weak but thats cause i had a weak source, coming out of a stronger source i think the senns would sound alot better. All in all its personal prefrence, go and listen to a bunch and just get the ones you like the most.