WD Se WD4000F9YZ 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Datacenter Capacity HDD - Newegg.com
Pros: These drives have proven extremely reliable. I bought 5 at once. Not one DOA. The run a little warmer than 1TB RE drives I upgraded from, but just a couple degrees. I have 4 in raid5 setup. I always keep an extra drive as a cold spare. I had one dri...