^ Hello patchesj. You definitely picked the right media player to accomplish your goals of a stripped-down, more pure audio path to your power amp. Currently, the 105 will only play dsd audio via cifs/smb (non-Win8), a usb drive connected to the 105, or an sacd disk. I have a NAS in my home network, and the 105 accesses it flawlessly (without a pc on). You can use either Oppo's built in player software (viewed with your tv/projector) or Oppo's ios app (MediaControl HD for iPad), to access your connected media/network drives to play dsd audio. If you have any active hdmi components connected to your 105 (tv ?) that don't support dsd, you'll just have to turn off the hdmi audio on the 105 to prevent the player from converting the dsd stream to pcm (88Khz, 24 bit) for all its outputs. DSD-direct to analog can't be accomplished if the 105 has to process a pcm stream. Also, with dsd-direct to analog, the 105's audio processing section is bypassed (no crossover, distance, down-mixing)...something to think about if you're playing multi-channel dsd files.
Depending on your input sensitiviy of your power amp (rca or xlr), you'll probably end up with a limited 105 volume range (maybe 1-50 ??), but that's perfectly okay. That also depends on the default gain recorded on your digital audio files too. On my system (105 direct to power amp), some digital files are loud enough with a 105 volume of 25-30, while other files are fine at 15 (I don't listen at deafening db's). Some users have run into not being able to play their music quiet enough, if needed (a 105 vol setting of 1 is not low enough). Again, that will depend on your input sensitivity of your amp and the default gain of your audio files/tracks). A word of caution if you connect the 105 direct to a power amp: whenever you decide to update your 105's firmware, doing a reset after the update(often recommended) will set the105's volume to a max setting (100). You'll have to always remember to drop the 105 volume way down after resetting your 105 before powering up your amp, or risk frying your speakers.
I wish you all the best in your goals. I think you will be quite impressed at your new-found fidelity with your 105. I sure am!!