I am going to buy the new 21.5" iMac. I surf the web, take pictures, will do some video editing, dvd durning, run business applications (word, excel, etc.), watch some TV shows, maybe movies. Maybe a video game 2x per year. Certainly nothing heavy duty. Are the following worth the extra $300: 1. the ATI card vs. NVIDIA 2. 1TB vs. 500GB 3. And, if I do buy the low end set up ($1,199) is it worth the extra $200 to upgrand the memory to 8GB? Thanks very much in advance for your thoughts.