I retired my VAIO and purchased my first Mac Pro, the two 2.26GHz Quad-Core Intel Xeon "Nehalem" processor one, hence my first post on MacRumors. I read some of the recommendations here and other sites and I am having a hard time deciding which hard drives to install in my Mac Pro. I am on the fence on (2) Western Digital 1 TB drives. The original release prices for both seemed to be at $250. The two choices below are: Western Digital Caviar Black 1 TB Bulk/OEM Hard Drive 3.5 Inch, 32 MB Cache, 7200 RPM SATA II WD1001FALS is now around $110 Western Digital RE3 Enterprise 1 TB Bulk/OEM Hard Drive 3.5 Inch, 32 MB Cache, 7200 RPM SATA II WD1002FBYS is around $160 Money is not the issue here. I want what is best for my Mac Pro, but I am not understanding what the difference is, and I have read so much tech talk online about what the RE3 is, and how it is based off the Caviar. Does the $50 price difference mean that the RE3 is better? Please help. Update - If you believe the Western Digital drives I mentioned above is not the way to go, I am open for other options/suggestions. Thank you.