The NAS element is still (!) something I need to pursue, as it is something friends @ other forums have been using for up to 4-5 years by now and yet I've sat on the fence, backing up lossless -- including damned large hi-rez FLAC data -- to an array of (I think I'm up to 12TB worth) hard drives and 3TB of "cloud" storage. Seems a single NAS would go far to (1) simplifying storage of and access to material and (2) provide "safekeeping" security associated with the - as I undertsand it - emergency backup system, i.e., "RAID". Even two NAS boxes would be less clutter than having a half dozen hard disc drives piled up. The cloud storage is, of course, sans "clutter", but for how long will it be around? Do I awaken one day to a world @ which Dropbox and/or Yandex Disc are just "gone" .... vanished, along w/ 4TB of my archived material?
I can highly recommend getting a NAS, especially if you need to access your media storage from multiple devices. Mine is an older device, but it has a decent DLNA server and supports both FTP, Windows file sharing (CIFS) and NFS for *nix machines. Everything on it is available to stream to any device on my LAN, it's very handy. BubbleUPNP on Android can stream to a Chromecast, and my HTPC has the disk mounted as a network drive. 1GBit ethernet is plenty fast for anything, no hitches at all.
I would recommend getting a 4+ disk unit and configuring it with multiple RAID-1s or as RAID-10 if you're using identical disks.