Hey Matt I'm curious why no USB input on the Berkeley is a deal breaker for you? IIRC your stated goal was the best playback of redbook. If that's the case not having a USB input really doesn't matter since you could just use an SPDIF input..
I also think you should seriously consider using something other than a Mac Mini as a source. There are several units that will handily outperform the Mini.. and for not a lot of money..I'd recommend that you look into an Auralic Aries, or a Moon Mind, both out perform a Mini and both will output SPDIF (the Aries has USB and various SPDIF outs) and they're both very reasonably priced, and with either you could still use the Mini for storing your files ( although a Nas would be better)
Or if you wanted to keep things even simpler you might want to consider an Aurrender, if you wanted to go with a one box solution.
In any case I think the Mini may start to be a limiting factor in the performance of any Dac you end up with.
I also think you should seriously consider using something other than a Mac Mini as a source. There are several units that will handily outperform the Mini.. and for not a lot of money..I'd recommend that you look into an Auralic Aries, or a Moon Mind, both out perform a Mini and both will output SPDIF (the Aries has USB and various SPDIF outs) and they're both very reasonably priced, and with either you could still use the Mini for storing your files ( although a Nas would be better)
Or if you wanted to keep things even simpler you might want to consider an Aurrender, if you wanted to go with a one box solution.
In any case I think the Mini may start to be a limiting factor in the performance of any Dac you end up with.