seagate or western digital?
I've narrowed it down to these options (unless there's another brand offering the same that I haven't yet found);
Seagate Momentus ST9750420AS 750GB 7200 RPM 16MB Cache 2.5" SATA 3.0Gb/s
http://www.newegg.ca/Product/Product.aspx?Item=N82E16822148599
or
Western Digital Scorpio Black WD7500BPKT 750GB 7200 RPM 16MB Cache 2.5" SATA 3.0Gb/s
http://www.newegg.ca/Product/Product.aspx?Item=N82E16822136835
Mac OS X (10.6.7)