Just a quick review of the DAC+PI combination.
I have been doing some listeneng today, and have been very impressed. Listening through a pair of ESL57's with a Quad 303, the sound is exceptionally well imaged and the dynamics are very revealing to say the least. There is an organic character to the sound stage, which I suspect exists due to a low level of jitter.
The PI is now finally a true Audiophile piece of kit, which can compete with some very expensive gear. Not the best by sounding system ever, but easily the best value I have come across when paired with this great DAC.
Thanks Crazy Audio!
Buy this DAC an stick it on your PI. Now.