Jhold - I have new MacMini with OSX on it and 500GB Firewire drive "Neptun" from OWC (pretty quiet) for computer backup. I'm planning (in future) to create music server using another Firewire drive. With the current capacity of CD you could probably store 1500 CDs in Apple lossless format and it's only about $100. When you need to expand you can daisy chain another Firewire Neptun. Backup of the music server comes to mind since you spend a lot of time to rip and compress disks and don't want to loose it. When it comes to that point "Neptun" will be even cheaper and you can daisychain many. Keep backup in different house (Theft, Fire etc).
Connect MacMini's optical out using Tosslink (possibly glass one) to the DAC. I use jitter rejecting Benchmark DAC1 that cost around $1k. Get newer USB version ($300 more) just in-case. Benchmark has volume control - I use only digital (CD, DVD, TV) and connect XLR outputs of the Dac to Power amp directly.
Connect MacMini's optical out using Tosslink (possibly glass one) to the DAC. I use jitter rejecting Benchmark DAC1 that cost around $1k. Get newer USB version ($300 more) just in-case. Benchmark has volume control - I use only digital (CD, DVD, TV) and connect XLR outputs of the Dac to Power amp directly.