Ok folks, I'm a college student with a budget, and after hours of online research, these are the best DACs I found. Now, I really need your help eliminating, and comparing and contrasting these, since I can't compare all four of them anywhere close to where I live. Also, I don't care about features, all I want to know is which one will produce the BEST sound. My current set up is a late 2011 MacBook Pro with its standard sound card, Channel D Pure Music iTunes plug-in, and a pair of Audioengine A2, which I will be connecting the DAC to, obviously. And yes, most of my music library is in Apple Lossless codec. HELP! Please and thank you.