Hi everyone! I am up to buy a new Macbook and have some doubts about which model should I choose. I mainly use SPSS (statistical package) and also Paralels to run windows xp and NVivo (qualitative analysis software). Should I go for the 2.0GHz and upgrade it up to 4GB ram or get the 2.4GHz with 2 GB? Is the 400 Mhz difference worth enough for me in order to pay 200 euros more? I don't think I need the backlit keyboard, though it is an extra... Thank you very much for your help!