Is there any advantage - audibly or otherwise - to storing and playing music from a SSD vs HDD? Besides price, I know that SSD's are more expensive. I'm wondering if the lack of moving parts in SSD's would provide any noticable benefit in final SQ. Next question would be internal vs. external...

I'm trying to determine the best interface between my computer and an external DAC (looking at new Bifrost).  Trying to avoid going with a typical USB connection and would prefer S/PDIF.  Is there a sound quality difference between using the motherboard's optical port and going with something...