Fubar III

If you want quick and no brainier headphone listening experieance consider Firestone audio Fubar III usb-headphone amp combination. It's as easy as it gets. Just plug it to your laptop or PC and put on the headphones. Voila! You are at you personal musical garden. Here is one of my review:

http://www.onheadphones.com/product-reviews/fubar-iii-usb-dac-and-headphone-amplifier.html