I have a Galaxy Nexus smart phone, I understand that this phone has a TI DAC, which in the audiophile community is regarded as pretty good. I am using power amp and I mainly listen to Radiohead. I'm a huge fan and have every single song by these guys, and I read that the HD-600 were the best headphones for Radiohead overall. My first question is How would these headphones sound unamped, plugged directly into my GNex? My second question is would purchasing the Rocoo- P be a wise investment as an alternative DAP? How much better would the SQ be in contrast to my GNex?