I have the 7200 rpm 20 gig ata66 maxtor hd, and while it's given me no problems whatsoever, for weeks at a time it constantly gives a high-pitched sound that drove me crazy unless i drowned it out with music...for the price/performance it can't be beat, (got it last year for about $120, thanks to this forum), but I would rather go with an IBM drive...i've heard that they're quiet.