OCZ Vertex 4 120GB for OS since i don't need to get coffee when i use my personal computer. After 2 RMA's of my OCZ Vertex 2 ssd i got this Vertex 4 from OCZ. The Vertex 2 was at the time of buying the king of SSD's. For Games and Apps WD 1TB Velociraptor since i hate loading times and using SSD is way to expensive. The Velociraptor is the best option if you want speed but not SSD prices. And a WD Mybook 3TB to backup up everything "Better safe than sorry" and uses USB 3.0 thus fast backup and i have a good experience with WD USB drives since my WD My Passport Essential 500GB still works after 4 years. My DS410 uses 4 Hitachi Deskstar 2TB since they were the best option at the time with compatability, speed and price.