I'm traveling to Paris next next and Lourvre is on the top of the list of things to do. I only plan to carry one lens with me inside. I've never been inside so right now i'm thinking my 17-40L on my 50D body. I think i'll be close enough that I won't need a long focal range. And the width of the 17 would be good for large and "up close" art. Is there another lens I should consider? I have access to a wide range of lens so getting one specific to this site won't be a problem.