I am sure that the digital cable that milo0812 recommends is fantastic.
Another option is the Cullen 2 Meter Nitin Digital Cable ($77) which I use between my Node 2i and DAC. I can easily hear the difference between the 2is built in DAC and my modded Museatex Meitner DAC. My understanding is that Cullen was purchased by another cable company but his website indicates if you are interested in his cables to email him at the email address provided.