Hey, I am about to place the order for a new HDD to replace my to-small 60GB stock macbook drive... for my 1.83ghz Rev A Macbook... I have narrowed down to these two: 1) http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=3281096&CatId=1277 Western Digital 160GB Scorpio, 5400Rpm, 8mb, Average seek = 12ms Average Latency = 4.2 ms Priced at 109.99$ Cdn 2) http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=2967447&CatId=2676 Hitachi Travelstar 5k160, 160Gb, 5400 Rpm, 8mb Average Seek = <11ms Average Latency = 5.51 ms Priced at 115.99$ The real question is what are the Ave. Seek time, and what is the Ave. Latency and based on above, which drive do i want? The hitachi has perpendicular recording, i dont know what that means... Does anyone have these? are they noisey? or a battery drain? Right now i am leaning for the WD Scorpio.. Can someone verfy and second me? or argue against it? Just take a look at the links pls..