I am a new user, still on the one month free trial with Channels, but I like what I see. HDHomeRun Flex 4K for antenna and Verizon FIOS for TVE. Currently using my WD My Cloud Home as the server for Channels DVR, I don't even remember how it ended there 
I am thinking of getting a more powerful NAS for Channels, but not just Channels, as I do need to expand my overall home storage (other stuff too).
From what I read around here these forums, it seems like the consensus here the Synology is the best option, the DS220+ or maybe the DS720+, correct?