I have a Toshiba L675D-S7016 laptop...I need to replace the hard drive, which is a 320GB, 5400RPM, 2.5 made by Toshiba. I would like to upgrade to maybe a 500GB...could I use a 7200RPM in this laptop or should I stick with the 5400RPM? Also would like to use another brand other than Toshiba. Any suggestions?