Bought the Qnap TS-451 - Which Drives?

So, I got this to replace my old Windows Home Server V1 box. Looking to get 2 or 3 tb drives. Box will be used for backup for 5 computer, serve files for our small business both locally and a remote employee as well. I got the old WHS box because it was simple, cheap and would serve as a backup machine (which is really all we used it for) but now we want a little more.

I keep reading about the WD Reds failing, Seagate NAS failing, etc so I don't know what to get. Hoping to keep it close...

Bought the Qnap TS-451 - Which Drives?