I don't know if it will outperform all CD transport/DAC combos, but a hard disk computer system is capable of very high quality. The Apple G5 is an excellent starting platform. In combination with iTunes and an iPod (optional) you'll have unparalleled access to your music collection.
As an example, the other night I was listening to Lucinda Williams' "2 Cool To Be 4-Gotten" and the first verse is about Robert Johnson. I mention this to my girlfriend and she asks, "Do you have any Robert Johnson?" Two or three mouse clicks later we're listening to RJ singing "Stop Breakin' Down" which we then followed with the Rolling Stones version of the same. This led to a comparison of their versions of "Love In Vain", followed by the Clash doing "Train In Vain" and finally Dwight Yoakam's cover of the Clash tune. Instant access to your music collection will transform how you listen.
As an example, the other night I was listening to Lucinda Williams' "2 Cool To Be 4-Gotten" and the first verse is about Robert Johnson. I mention this to my girlfriend and she asks, "Do you have any Robert Johnson?" Two or three mouse clicks later we're listening to RJ singing "Stop Breakin' Down" which we then followed with the Rolling Stones version of the same. This led to a comparison of their versions of "Love In Vain", followed by the Clash doing "Train In Vain" and finally Dwight Yoakam's cover of the Clash tune. Instant access to your music collection will transform how you listen.