NOTE: I am NOT asking if there are any reasons not to buy a MB Pro to begin with. I know there are lots of them. So let's not go there, not here not now. I need a larger portable screen day to day than my 12 inch MacBook, and I'll appreciate the larger touchpad as well. I am set on buying one. What I want to know if there are any disadvantages to buying one fully loaded, the fastest processor and the 16gb of ram. Is the battery life any less because the processor is more powerful? Will the fan run any more than on a model with the i5? The difference in price is not a factor of great significance at the moment. thanks for any advice.