I'm trying to decide on a new hdd I'm about to switch to the sandy setup and want a better HDD I do allot of gaming & Video editing. BUT! I install all my games on my second HDD 1T and it plays perfectly. So this will only be for the OS and a allot of video editing and encoding. Western Digital Caviar Black WD7502AAEX 750GB 7200 RPM 64MB Cache SATA 6.0Gb/s http://www.newegg.com/Product/Product.aspx?Item=N82E16822136794 or Western Digital VelociRaptor WD3000HLFS 300GB 10000 RPM 16MB Cache SATA 3.0Gb/s http://www.newegg.com/Product/Product.aspx?Item=N82E16822136322
Personally if this is an OS drive I would go with the Velociraptor for faster OS boots and file transfers. However if you need the space then go for the Caviar.