Another solution is the NAD dac1, cost $200. Its available everywhere like best buy, crutchfield, audio advisor, etc... It's a wireless system with a small transmitter that plugs into your Mac/pc via a USB cable, the other component, the receiver, has both line level and digital outputs. It's a very simple set up. Requires no software, other than iTunes or whatever's native to your computer. I have one connected to my CD player via the digital out and it works well.
Do a web search and check it out.
http://nadelectronics.com/products/digital-music/DAC-1-Wireless-USB-Digital-to-Analogue-Converter
Note: you can go nuts trying to select a digital cable. From the reading I did whatever cable you do select make sure it's at least 1.5M long. IMHO - it did make a difference.
Good luck
Do a web search and check it out.
http://nadelectronics.com/products/digital-music/DAC-1-Wireless-USB-Digital-to-Analogue-Converter
Note: you can go nuts trying to select a digital cable. From the reading I did whatever cable you do select make sure it's at least 1.5M long. IMHO - it did make a difference.
Good luck