Hart50

I appreciate this may have been asked before but I did a search and I could not come up with anything particularly useful. In any event, I just purchased a Synology DS415+ and was wondering what the best RAID configuration would be? I will be using the NAS mostly for audio file storage (need to rip about 4000 CDs) and as well as using it as a server for my Auralic Aries and Ayre QB-9 DAC. Thank you for any assistance.