My preferred way is using a USB cable to a nice DAC. However, someone younger may want wireless from an ipod. The problem there is the quality is usually limited to MP3 from an ipod.
Some DAC's and players can connect via wifi (Oppo for example). The problem there is it is not always easy to read the computer files.
So again, I'd stress decent software such as media player or jriver or 100 other choices via usb to a dac to your amp.
Another way to simplify that is to get an amp with USB input such as a peachtree. That has a really nice built in DAC instead of needing an external dac.
For bit rate: There's no reason not to use the maximum available. What is your cd ripped at? What can your DAC handle?
Some DAC's and players can connect via wifi (Oppo for example). The problem there is it is not always easy to read the computer files.
So again, I'd stress decent software such as media player or jriver or 100 other choices via usb to a dac to your amp.
Another way to simplify that is to get an amp with USB input such as a peachtree. That has a really nice built in DAC instead of needing an external dac.
For bit rate: There's no reason not to use the maximum available. What is your cd ripped at? What can your DAC handle?