I need to replace a bad drive on my HTPC and was wondering what my best option would be? I was thinking of a NAS drive because of the 24/7 a=feature but then saw the new surveillance drives and was wondering if these were better for my usage. I mainly use the HTPC for DVR purposes with WMC and the occasional web browsing. The OS is on a separate SSD and the drive I need to replace is mainly for DVR and media storage. Thanks for any response.