Since I started to have more and more bulky files, seems that the disk access time has been increased significantly and Leopard often hangs when it is accessing the hard drive. I'm currently using a 17" 2.33GHz Core2Duo MBP with 2GB RAM and 160GB 5400rpm HDD. The one I'm looking at is Hitachi Travelstar 7K200. I just have a few questions here, 1. Generally speaking is it worth the upgrade if I'm going to use the current laptop for 2.5 years longer? 2. How much speed increase will the new hard drive bring? 3. Anywhere to get a cheap yet genuine 7k200 in UK? Thanks a lot!