Hey there, Hi there, Ho there,
as the Disneyland Resort Paris is my "home resort" I would choose Space Mountain if the event would be held in that park and I would have to choose from that list - if I had free choice and again the event would by at DLRP I would have to make the taugh decision between the Visionarium and Cinemagique...
If held at WDW I'd go with Carousel of Progress, if held at DL Anaheim I'd choose Splash Mountain.
Yours
Dirk