Hello. I am considering the 17" model. I have a few questions: 1. Anybody knows the difference in battery life between the i5 2.53HGz and i7 2.66HGz models? 2. Will I see noticeably different when running computationally intensive simulation tasks? Looks like the i7 model can run over 3GHz. 3. In the new model, switching the GPUs seems to be automatic. Unlike the previous MBPs, there is no need to logout for the switching. Am I right? 4. Does the SSD drive consume less energy than HD? If so, how many minutes gain in terms of battery life? 5. I heard that in previous MBPs, one could take the SuperDrive out and replace it with a SSD drive. Can I do that with the new model? Is it easy to do it? 6. It looks like there is an option for 79 ISO keyboard. What is the advantage of using this keyboard vs. the original keyboard? 7. It costs $400 to upgrade to 8GB. Crucial charges $499.99 for 8GB. So, this time it costs less to buy the RAM from Apple. What is the catch? 8. If I upgrade the RAM to 8GB, will the battery life runs out in more than 20 minutes sooner? Thank you.