I am now rocking the Grado RS-1i headphones with an outboard amp by ALO Audio, the Rx Mark II Tactical Edition connected by a Fiio L9 line out dock cable which takes the analog stream out of the iPods 30 pin dock connector from my brand new iPod Classic.
I store all of my music in AIFF files which I find sound better. This is a nice portable system for my consulting travels on the road.
And it sounds terrific!
Here are some pictures for those of you into headphones. ...