I am currently in the process of replacing my hard drive in my HP Pavilion Dv7 notebook. I am upgrading from 640 MB to 1 TB and am not sure if I want to keep the hard drive at 5400 rpm or upgrade to 7200 rpm. I am mainly concerned about overheating. Please comment about brands as well I have a Toshiba hard drive at the moment and will not be buying another Toshiba for this computer. I was looking at a Seagate.