The type of cd will not affect the quality of the sound.
If it doesn't burn correctly you might get some bad playback issues (skips, pauses), and poor quality disks might not last as long as good ones.
I would suggest using Taiyo Yuden cds and burning them at 16x for music. If you are in the US you can find TY cds at online sites like rima.com or supermediastore.com. Amazon.com also carries them. They only sell them in 100 ct cakeboxes though, as I recall.