I am in doubt between: - Samsung SpinPoint hm320ji (80 euro) - Western Digital Scorpio WD3200BEVT (100 euro) Both are 320gb and 5400rpm. I would like to know where I can find the info concerning: -speed -noise -power consumption (would I get a lot of extra battery life with one of these?) -compatibility with my MacBook White 2.4Ghz? I am not a power user, just browsing et cetera, but it would be nice to keep booting fast. However, I care more about the noise and power consumption, and perhaps saving the 20 euros. Thank you for your help!