Do you have a solid state hard drive? It made a huge difference on my laptop with jriver. Faster, quieter and runs cooler.
Also, not only can an analogue volume control in a preamp be better at controlling the volume than the digital volume, the gain from a preamp will alleviate over-driving the amp or needing too much gain from the digital pre. I would set the DAC to a fixed volume out and use the NAD.
Also, not only can an analogue volume control in a preamp be better at controlling the volume than the digital volume, the gain from a preamp will alleviate over-driving the amp or needing too much gain from the digital pre. I would set the DAC to a fixed volume out and use the NAD.