I am panning a week trip to to Paris in November. The original plan in progress is to spend the entire time exploring Paris. I have had several people tell me that is not a good plan because it is so easy to get to London. Several people have suggested I make 2 days of the trip to London so that we get to see more. My question is for more experienced travelers, What are the pro's and con's for spending the entire time in Paris opposed to seeing London as well. Paris is my dream trip and no matter what, that is where I plan to spend the bulk of my time. Any suggestions?