Hey, I'm thinking about getting this drive for my new MacPro when I get it to storore the OS and main programs on. I've found various places to buy it online, and am a bit confused because prices to seem to vary wildly. I've found these two: Product Code:WD1500AHFD http://www.dabs.com/productview.aspx?quicklinx=40JB Product Code:WD1500ADFD http://www.cancomuk.com/products/se...TA 1.5GB/S 10K RPM 4.5MS 16MB CACHE Int S-ATA The product codes differ between the two, although they seem to be the same product. There isn't a different Mac and PC version is there? I just don't want to order the wrong thing!