Hello, I am a windows user. I have Dell Desktop and now plan to switch to MAC. With the money I have I can buy MacBook 2.0 GHz/iMac 1.83 GHz. I see that with iMac I get more functionality for money (Dual Layer DVD, 17" monitor, bigger HD) but with MacBook I get mobility. I am looking forward to your views about the choice to make. Any help?