The IBMs in question (75GXP onwards) all have heat problems. This eventually destroys the controller chip on the PCB, although some have also reported structural failure.
WD with 8Mb cache seems the HD of choice nowadays --runs much cooler and is pretty fast; although the latest Seagates are quite cool and very quiet, their performane is not noticeably slower than the WD really.
IBM claims to have solved these issues with their 180GXP: fluid bearing, 8Mb cache, it is supposed to be fast, quiet and cool. We'll just have to see...
Best thing is to consult
Storage Review in the meantime.