I am torn between the base model and the step up to 2.53Ghz, etc etc. Here is what I am doing, maybe you can help me make an informed decision. #1 HD Video and Photo editing using iLife and Aperture. (Not professional. Mostly pics of my family and newborn son etc). I may hook it to my 24" LCD every once in a while for ease of editing. #2 Web surfing, simple web design. #3 General PC usage for home and while I am on the road. **I will upgrade the base model to 4GB but am not sure that the slight speed bump, 3MB extra cache, and 256MB extra video memory would make sense to spend $500 for.