What would be the fastest HDD for my system to run. I already have a 1TB that I'm using for storage but my 250 that I had used for my system crapped out. I'm looking for about 500GB but I want it to be fast. The best one I have seen is the WD Cavier Black http://www.newegg.com/product/product.aspx?item=n82e16822136320 if anyone knows of a faster better one, help me out.