I have one of these and a 3 TB version in my HTPC. Works great. However, I have a 256 GiB OS drive. DVR HD's get very fragmented, and I run Auslogics every week. The drive with the OS never gets fragmented now. But yeah, you could definately get by with 1 HD.
16-55/28, 23/2, 56/1.2, 18-135, 100-400, 1.4x t/c.
Minolta MC 50/1.4, MD 135/2.8