Hi
In a couple of minutes i got this up and running:
- raspberry pi - model B - powered by a 4-Port noname USB hub
- 4 GB SD card /volumio dated 12/2013
- Music Library located on a PiBang Server via SMB
- DAC: Behringer UCA202
- Amp: Lepai LP-2020A+
- Speakers: Denon SC-F10S
This setup sounds GREAT and consumes next to nothing in terms of electricity!
Haha - The Monster cables (DAC -> Amp) alone are more expensive than the whole setup 
I am looking forward to pimp/exchange some components of this chain in order to see/hear what can be achieved in terms of SQ (Sound Quality).
Thank you so much!