Dear Gurus, My lovely two year old IBM 30 G hard drive has died. DT&T will replace it - but . . . Apparently there's a 7200 rpm IBM hd on the market. Better but is better hotter? My 240 (w heat sink) takes heat babying as is. Will the 7200 rpm raise the heat vs the present 4200? Donald McCaig Yucatec Farm Williamsville, Virginia