Mac Mini vs WDTV as a Music Server ??

I am in the process of setting up a Mac mini setup for my dad... I think it is great! movies, music, pics, podcast... all in one place with MAC remote :) And with Time Machine backup you know your collection is safe all the time :)

One of my big questions is which would sound better.

There are several variables at play and unless someone
has tried both then its hard to say which route would
sound better. I have read and been told that if your
DAC has both USB and Toslink, better try them both as
sometimes Toslink sounds better..

Has anyone compared both USB and Toslink outputs on a
MacMini (using a reference glass Toslink cable) and
determined a clear winner sound wise?

With the WDTV, the OS in embedded in firmware. There's
also a chance (maybe) that a MacMini has more going on
in terms of processes and disk activity and thereby be
slightly influencing the digital signal? Many had noted
that a MacMini with Solid State Drives sounds better than
with a regular hard drive so it is plausible the digital
signal could be influenced by noise or additional things
going on inside the box before it even hits the USB or
Toslink outputs..

Buying a MacMini to experiment could be an expensive
trial so I am curious if someone (who already has a
Mac Mini setup) also bought a WDTV just to try it out..

AppleTV would have been cheaper and easier, it's basically a no frills MacMini with better A/V connections and no disc slot.

Macdadtexas:

You make a very good point.. But just in case I want to go
hog-wild and serve up video as well, I am going with either
a MacMini or a WDTV due to both having 1080P video output.

Since the AppleTV only does 720p, I want to give myself
the option of 1080P via a MacMini or WDTV. I didn't
mention it as a main topic item because I wanted to focus
on the sound quality side of things..

Mac Mini with a SSD/ I,ve been researching Apple sights for months and cant find that option .