Finally I was able to get one of these beauties. The digital dock accesses your Ipod hardisk and outputs digital data for pairing with an external DAC (hence you’re not limited by the quality of the Ipod DAC).
It does the same thing as the Wadia i170, only it’s a little less buggy, has PC/Mac connection, and comes with a better remote control. It’s also cheaper for roughly $250 (less if you buy from bluetin.com).
Of course the limitation is the 16/44.1 digital format (limited by the Ipod), so in a way, you’re spending extra money on this digital dock while a PC or laptop could’ve done a better job with a 24/96 USB DAC like the Audinst or the Dr. DAC Nano. The nice thing about this, however, is that if you want to have a separate headphone listening set up away from your computer. The Onkyo dock, coupled with a nice DAC with built in amplifier, and you’re good to go.
I’ve been using this dock for the upcoming Matrix Mini-i and Dr. DAC DX2 reviews, and it’s really a joy to use. The convenience of an Ipod, without being stuck to sitting in front of the computer.