I also heard (read) all sorta horror stories from ppl with IBM´s 75GXP, 45GB and others too. Check out storagereview.com forums and you will know what I mean.
I was about to spend the extra cash and buy an ibm, but after all these trouble, I will rather stick with a quantum plus AS (I´ll buy one soon) or maxtor diamond plus...I don´t want no trouble or rma from ibm, thank you very much.
Of course you will only hear from ppl who has problems, but hey, ibm´s deskstar seem to be causing lots of trouble...I don´t see that many ppl complaining about their maxtor, fujitsu, quantum, etc...
I know that there are ppl quite happy with their 75GXP though...but why run the risk ?