Dunno about reliability yet, but that new WD Red 8TB unit I just installed seems nice. WD claims it has "NASWare 3.0", which as near as I can tell is a marketing term for "suitable for use in small drive arrays". Which implies that it has TLER to keep RAIDs happy. 3yr warranty here too.

WD Green no longer exists -- got rebranded as Red.
Which is a Good Thing(tm) for RAID, since the Green label didn't enable TLER.