Thanks all you guys again for all the info! Had a blast, consumed a lot of awesome culture and wine, took in musicals of Marry Poppins and Billy Elliot, spun around the London Eye, LOVED the d'Orsay, strolled around Versailles, got some French CDs, and took the metro and underground all over. Even had a bonus unexpected trip to catch a Star Wars exhibit at the Cité des Sciences museum! January was unexpectedly great because there weren't any crowds anywhere and both Paris and London had huge sales going on in their stores too...