Synology 2 bay Diskless NAS DS218+ $255 Amazon (reg $300)

It’s the high-end model of 2-bay NAS models, with transcoding and upgradable memory.
If you don’t need 4-bay for RAID 5 but want to use more features than just storing files, this should be a good choice.
https://www.amazon.com/dp/B075N1BYWX