I'm super duper happy with my Synology DS214Play. There may be better models out there by now, but this is doing well for me.

Yesterday one of the disks in its array went down and it calmly sent me an email telling me about it, and beeped gently in the closet (with an option to turn off the beep).

The Synology Hybrid Raid system is going to make replacing this disk super easy. I'm taking advantage of this failure to bring it up from 4tb to 6tb. I'll swap in a 6tb for the failed 4tb drive, let it rebuild and run for a while, then swap in another 6tb into the other 4tb slot, and then the whole thing will be up to 6tb with no downtime.

It does a good job of streaming video and audio. I can stream with either its Synology streaming servers or with Plex. It's a good host for Plex.