Hi all head-fiers,   That's my first post in head fi and I'm looking for some suggestions.  My current setup is ipod touch --(line out)--> Corda XXS --> Audio Technica ES-10. I mostly listen to J-Pop, Rock and Classical. Now I'm looking to move on to a home setup. I would like to keep the budget for the headphone under 600 US dollars. After doing a whole bunch of research, I narrowed down to two options- Denon D5000 and Beyerdynamic DT880. They are both all-rounded...