I had the same decision to make a couple months ago and based on reviews (both pro and consumer) and opinions posted in forums, seems like a pretty even split--you'll always find opponents/proponents of both. FWIW, I settled on pair of 320 GB 7200 Seagates for my Macbook and Mini and couldn't be happier--run nice and quiet and cool. Either way you go, both are known to be good performers.