Quickest 1TB or 2TB HDD

As a 1TB drive, you aren't going to really find anything quicker or that you will notice is quicker than the Samsung Spinpoint. I would recommend getting / keeping this hard drive versus going with another hard drive.

To really gain any real performance increase, you would need to go with a SSD but for just gaming, it isn't worth it... IMO (overall system / non-gaming or just a few games... Yes on a SSD)