Superpet has no Western Digital hard drives in stock. Not sure how long that problem will last. However, Alredo said that the Maxtor DiamondMax Plus 9 hard drives are good too.
Performance sounds ok. 8MB buffer and 7200RPM should be adequately fast. The spec sheet says it's good for digital video.
I couldn't find a review of it on storagereview.com so I am not sure about its reliability or how it compares against the well-regarded Western Digital 'special edition caviar'drives. I could only find a comparison of the DM9+ versus a Seagate Barracuda. It points out that they only offer one-year warranties on their drives, while Western Digital boasts three-year warranties. ewww.
Feeling like maybe I should look harder for Western Digital supplier...
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followup...
I started a thread on StorageReview asking about the reliability differences between the Maxtor DM +9 and the WD. The respones have been that now there are no significant differences, that Maxtor has got past their thorny patch.