So I have an K272HD which I love with folk/accoustic/singer songwriter music. At home I primarily use it with a WA2, and find the combination exeptional. I also use it with a TTVJ slim for a more transportable setup. My question is what would be the next step upgrade wise? The reasons why I love the K272HD is its midrange and the smooth treble. I dont need a headphone with more bass. While it is a closed headphone and I would primarily want to upgrade to a new closed headphone, it is not a requirement. I also own a HE-500 and HD650, however with the genres mentioned above I find the K272HD more enjoyable.