I am having the core i7 920 build and it is not having the hard drive as I want. For now I have 640 GB WD Caviar Blue. Now I want to upgrade to the Windows 7 RC and while doing that I want to upgrade my hard drive also. But, I am confused about the Velociraptor and SSD. If anyone is having the details about that, then give me details about it. So, I can select one from them.