The Mac vs PC thing is a classic debate and, as with most topics in audio, there isn't a single answer. I rip CD's using either my Mac or PC and then transfer the data to a Linux-based music server. So in a way I use both or neither, depending on how you look at it.
What else do you plan on doing with the computer besides having it as a music server? That will help to answer your question, because there are things that Mac's are very good at (video editing, for example), and there are things for which there is only software available on the PC. (Although you can actually run Windows within a virtual machine on a Mac using software such as Parallels.) It all depends on your personal preferences, willingness to learn at new system, compatibility with things at work and home, etc.
Michael
What else do you plan on doing with the computer besides having it as a music server? That will help to answer your question, because there are things that Mac's are very good at (video editing, for example), and there are things for which there is only software available on the PC. (Although you can actually run Windows within a virtual machine on a Mac using software such as Parallels.) It all depends on your personal preferences, willingness to learn at new system, compatibility with things at work and home, etc.
Michael