While this might seem like a no-brainer, I realize that SF has a certain pull. So, the question for you becomes how much do you like driving? Can you use the time in the car for three hours a day productively (eg language tapes, book tapes, etc.) or will you be screaming out your window at the fools who aren't moving? Three hours a day (if that's what you will do) could be grueling. I guess you could also do it less frequently, which could have some advantages.