Back from a recent trip...
Centre Pompidou, kids enjoyed this quite a bit, esp the Koons retrospective. The entire 6th floor was closed however (until April)
Pinacotheque de Paris - A Klimpt/secessionist exhibition. What appeared to be the entire Beethoven frieze, Judith and a few lessen known works. Schiele and Kokoschka also represented. Highly recommended if in Paris, on display until mid June.
Musee Picasso - Wow!
Would have liked to have gone to another art museum (Musee de arte modern de ville de Paris, would have been the choice), but it was a short trip (5d/4n).