160GB 7200 vs 200GB 7200 which one is will be faster in the macbook pro? I heard that 160 will be faster because it will need less time to load the whole drive. Am I right? I will get macbook pro 2.2 with 2G Ram and 120GB HD. SO I want to updated to 4 G Ram and The best of these two hard drive. and do I have to chose Hitachi or Seagate.