Ok I'm replacing my current NAS with the Synology 412+ and I'm looking for which 4TB drives to get for it. I'll be using it for streaming 1080P content (Plex) to multiple clients simultaneously both local and remote. I'm also going to use it for music streaming and Time Machine backups. Transfer speed is very important to me. At times I'm transferring 32GB+ of movies at a time to it and I don't want it take forever all the while I'm actively streaming content etc... people suggest Red drives but I'm just not convinced they will give good performance. I'm thinking of either going Seagate Nas, Red, Red Pro, or RE 4 drives... not sure what to pick. Any thoughts?