Hello, I am looking into buying a macbook or macbook air (when the price goes down) I'm kinda new so I hope this doesn't sound like a stupid question. I'm wondering how fast the macbook air really is. Right now I have a Dell Pentium 4 2.4 GHz PC. I don't know how the Dual Core 1.6 GHz macbook air's speed would compare to that. Since it is dual core would it be faster or slower? Thanks!!! Any help/suggestions would be appreciated.