Althought i still havent use the hdd yet cause i havent got myself an external casing, i'm kinda in a dilemma and need you guys' help. My notebook currently use an oem seagate 4200rpm 80gb hdd. Do you guys think its wise to switch to the new 5400.2 rpm hdd or should i just use it as an external hdd? will there be any significant improvement performanace wise? what about power comsumption? Also because i'm not sure what it will do to my notebook warranty if i were to change the hdd cause it'll be a total waste if my 3 years warranty got void. cause the 'warranty void if seal broken' sticker will be torn if i changed the hdd, dont really know how serious that's gonna be if and when i take my notebook to the service center.