I just use Bit Perfect and iTunes. Sounds good, easy to use, and the price is right.
13.3" MacBook Air, 4GB RAM, 256GB SSD, iTunes/BitPerfect MacBook Air SuperDrive Western Digital My Book Essential 2TB USB HD Schiit Bifrost USB DAC and Audioengine D3 DAC Emotiva USP-1, ERC-1 and two UPA-1s Pro-Ject Xpression III and AT440MLa AKAI AT-2600 and Harman Kardon TD4400 Grado SR80i Wharfedale Diamond 225 Rythmik Audio F12
Just thought I would throw in that the audio out jack on a Mac Mini is both an electrical connector, and an optical connector, specifically mini-toslink optical. In fact, the electrical part is TRRS, i.e., 4 conductor, so can be used as an input too! Use a TRRS to split TRS cable, like this: www.headsetbuddy.com/pc-computer-headset-to-3-5mm-smartphone-adapter/