**I won't be commenting on the build quality or the features of the DAC, this is a sound quality vs the Apple dock review only.**   The Pure-i20 is a very well priced product COMPARED to the other Ipod dacs out there BUT the sound quality upgrade is small compared to a normal apple dock and it could be a waste of money depending on what you are buying it for.   This was test rig:   Rega Ear headphone amp Audioquest Golden Gate interconnect (£60) [a very 'clear' revealing interconnect, used for both docks] Cambridge Audio Pacific...