I will be purchasing a new mac pro soon and plan to add two 1 TB drives setup with a software RAID 0 with a small stripe for cache and the much larger for data. I am trying to decide between the 1 TB WD Black and the new 1 TB Seagate 7200.12. From what I have read in reviews, the WD 1TB has a pretty good proven track record as well as good performance. (Overall...there of course are always failed drives) The Seagate is new and somewhat unproven and some folks seem to be a little gunshy of Seagate because it sounds like the had some firmware issues with the 7200.11. However the new drive looks to be at least as fast if not faster than the WD. Uses only 2 X 500GB platters rather than 3 X 333GB like the WD, which should make reliability better. And the Seagate may also be quieter. With all that I am leaning towards the WD because of the track record and some have said they don't see any noise difference at least between the WD and other drives even though the WD are supposed to be a bit noisy. Anyway any opinions would be welcomed...Thanks.