Going to get myself another for media files later this year.
I can't speak highly enough, or more practically recommend, Synology products, over any alternative, for media/file serving.
Run two of their NAS' in my house and they are fucking bulletproof. Rebuilt/expanded their original volumes a couple times now as my needs grew, with minor issues (worst case was I had to ssh into a box, and manually shutdown services before fscking the main volume, to resolve issues that prevented me from further expanding).