Logitech Duet, doesn't need a DAC, but it surely benefits from one, requires either a direct connection to your laptop or a wireless connection in your house. Wadia iPod doc, does need a DAC.
Personally, I like the Duet, I have mine going into an excellent Upconverter (DCS) and then to a DAC (DCS) and the performance is terrific. But just straight in, especially into a mid-fi system is pretty good too.
Personally, I like the Duet, I have mine going into an excellent Upconverter (DCS) and then to a DAC (DCS) and the performance is terrific. But just straight in, especially into a mid-fi system is pretty good too.