Thought I would try to share my various findings along the way of trying to answer my own question.
System used:
D'Agostino preamp and 2 Momentum Stereo amps using one for each channel powering Raidho D1s and stereo Wilson Watch Dog subwoofers. Interconnects, speakers cables and power cords are Shunyata Anaconda Zitrons. Everything except power amps and computers were connected to a Shunyata Triton/Typhon on a dedicated circuit. The computers were plugged into a separate electrical circuit. The power amps were plugged directly into the wall on a dedicated circuit. Components are on Naim Fraim stands and the amps are on SRA amp stands.
The DAC was an EMM Labs Dac2x.
The contenders:
1. Apple Mini (mid 2012)
2. Apple Mini w a Berkley Audio USB using AES into the EMM
3. Apple Air w 756 g flash drive (2013)
4. Apple Air w the Berkley USB
5. A Computer Audiophile CAPS 3.0 Carbon built by Small Green Computer Company
6. The CAPS w the Berkley USB
7. The CAPS w the Red Wine Audio Black Lightning battery power supply
8. The CAPS w the Red Wine Audio Black Lightning battery power supply w the Berkley USB
9. Naim Unitiserve using BNC spdif into the EMM. The Unitiserve is a single purpose computer that Naim puts together to rip, manage and then send the digital signal by spdif and also works as a UPnP server for streamers.
10. Naim NDS served by the Unitiserve UPnP. The NDS is a streamer that includes an internal isolated DAC. I used the NDS with two Naim 555PS power supplies. One power supply powering the analog portion and one power supply powering the digital section. Only one power supply is required, and various power supply's are available to use with it.
Comparisons:
When I used the Berkley on the Mini, it improved the sound by a pretty good margin as in enough to be very hard to go back to going without. It had a larger but still believable sound stage with more resolution in a good rhythmic way not a technical way. With the Air and CAPS, I felt it was better when the Berkley was used and when using the CAPS w the Lightning battery pack I felt the Berkley actually got in the way somewhat.
The Lightning battery definitely improved the CAPS. Not quite as much improvement as the Berkley had when added to the Mini but a bunch better. It doubles the cost of the CAPS but worth it.
The Air is better than the Mini by themselves, but they are a push when both use the Berkley. So I used the Mini w the Berkley in most of my listening.
The answer to my original question is: Drum roll please. . . . The CAPS w Lightning battery is better than the Mini w Berkley but not by a large margin.
So my initial goal of a no windows solution was a fail with the addition of the Berkley to the Mini. BUT I did find a solution! I decided that I would break down and buy the Naim Unitiserve that some friends had recommended so highly for the last year or so. I hadn't bought it before because I just couldn't get past the part that is just a computer in a Naim style box for over 4 times the price at $4,000. Sigh
However -- The Unitiserve going to the EMM is right up there with the CAPS w Lightning. I'll would give the edge to the Unitiserve but its close enough so I'll call it a push. It does cost double of the CAPS w Lightning, but in all fairness, the Unitiserve does provide a pretty idiot proof way to get bit perfect rips and NO WINDOWS, so for a simple elegant solution it's an ok value. The CAPS is no doubt the best value if you are semi computer literate and to be honest, even for an anti windows guy, it's not that bad to set it up to work great.
The best sound was Naim NDS served by the Unitiserve and it is definitely better than any of the above ways using the EMM. Part of this is probably the DAC section and power supply, but I wonder if streaming isnt part of the reason too.
I was actually surprised about this outcome. Naim, in general, sounds great when in a complete Naim system and usually doesn't sound very good at all when used with other companies components. I was expecting the NDS to sound better w the Naim pre and power and the EMM to sound best in just about any other system. Goes to show you - ya just have to listen.
