If you are using a Mac, is there a reason why you don't want to use the Airport Express? The 3.5mm jack also has optical, so just plug that into the DAC.   http://crave.cnet.co.uk/accessories/using-apples-airport-express-with-a-dac-a-how-to-guide-49303132/

It may be out of your budget, but I would recommend you listen to the ELAC MicroMagic, Don't let the size deceive you!   (I am the UK distributor for ELAC, but I wouldn't recommend a product I don't have faith in)