Music from hard drive better than CD?


Hi folks, I'm considering to buy a MacIntosh G5 for using it as a source in a high quality audio system. Will the Mac outperform the best CD-transport/DAC combo's simply by getting rid of jitter? It surely will be a far less costlier investment than a top transport/DAC combo from let's say Wadia or DCS, hehe. What is your opinion?
dazzdax
Gordon Rankin's Cosecant USB Computer DAC with a small iMac laptop appeals more to me. We will see what Gordon has up his sleeve this year, but the sound he was getting through this system (combined with his very nice amps) at CES2004 was enthralling. Perhaps you can pick up some useful information from http://www.wavelengthaudio.com/Cosecant.html

Regards,
I tried to plug my PC (with the NVidia media built in to my laptop) on my BAT30SE pre with B&W N802's using a Cary 306 player). It's still a long way shot. It's not as musical as when playin a CD.
PC HD's store music in wavefiles(MP3)- a shortcut/condensed version of the CD. It would not pick up the whole package from a musical medium during the transfer although when replayed, the ears can still hear a complete version. Using a decent player is still the way to go for now or better yet an SACD.
I'm not sure if there's any tweaky part of it to match the CD version. Gentlemen? Ladies?