The ATV is a good sounding unit- I think it is just as good sounding as the mini.
From an audiophile perspective the fundamental difference between the two is that the mini can play 24 bit material while the ATV cannot. The mini does get you firewire which I have taken advantage of as well. The mini is much more flexible.
So depending on how you use it it could be a close race- or a blowout. I wouldent jump to a mini for USB alone- but if any of the other advantages apply than go for it.
From an audiophile perspective the fundamental difference between the two is that the mini can play 24 bit material while the ATV cannot. The mini does get you firewire which I have taken advantage of as well. The mini is much more flexible.
So depending on how you use it it could be a close race- or a blowout. I wouldent jump to a mini for USB alone- but if any of the other advantages apply than go for it.