Hi All, So I'm planning on ordering my new Macbook very soon, but I'm a bit confused. I don't know anything about computers, so what's the real difference between 2.0 ghz and 2.4 ghz in how the computer runs and functions? In general I have multiple applications open (4-6 at the same time) and sometimes I will be using Bootcamp to use ArcGIS or Autocad. Also, whichever Macbook I get I will upgrade to 4 GB of ram and the 320 GB hard drive. Will the .4 Ghz, make a difference, or will it not really be noticeable? If it makes a clear difference, than I will definitely spring for the more expensive macbook, but I dont care at all about backlit keys. I've had my old powerbook with backlit keys and I've never really used them, which is why I'm ambivalent about paying so much more for backlit keys. thanks!!!