Rather than get a setup that requires a lot of external devices to get the features you want, why not consider a different SFF PC based on a mini-ITX platform? You can build some pretty small HTPCs with one of these boards and have analog audio output as well. It won't be as small as a NUC, but you'll be able to use standard hard drives and RAM and won't have small boxes hanging off the USB ports. Another solution would be to get an AVR (audio/video receiver) that can process the digital audio and provide the analog outputs you need.