PC vs MAC laptop as music server

Re Tok20000's first post, above. The following is from Empirical Audio's Web site:

The USB Off-Ramp 3 provides provides a USB computer interface to your audio system with unprecedented sound quality. With support for 24/96 resolution and bit perfect playback from PCs and Macs it is simply the best USB converter.

According to Steve Nugent at Empirical, playback from a Mac with iTunes is indeed a little less good than with Foobar. He does say that it is still excellent, though.

I switched computer platforms way back at DOS 3.3. I can handle Windows if I have to. Now that Macs have Intel processors and run both systems, I may one day try EAC and Foobar in order to hear for myself what the degree of difference is.

Steve Nugent's claim for the quality of EAC and Foobar is IMO the best and really the only argument for choosing a Windows platform for music, if your level of experience is the same with both operating systems. If you want to assemble your computer yourself from parts, that's another hobby and a different set of concerns.

Tok20000, it's interesting what you say about the importance of the computer's power supply. My brother runs a home studio built 'round an iMac. I gave him a good isolation transformer. He plugged the computer into that and the overall sound gained noticeably in clarity and smoothness.

Would you want to change out the whole supply for a new subassembly, or just change parts, and to what?