I've been to 2 on your list.
Efteling and Walibi World are absolutely fantastic. Efteling, see my topic in 'All other Parks and Attrtactions', and you'll see why. One of the nicest looking, well themed and just plain magical theme parks ever. Actually scratch that. It's as good as the Towers, if not better for scenery, theming etc. Rides, obviously not, but still fun.
Walibi World is great, apart from a love of off the shelf Vekomas. But who says these old classics aren't fun. The real sellers for Walibi are Goliath (Intamin Mini-Hyper) and Robin Hood, a lovely Vekoma (I think), woodie.
[size=90]For some things there is no rational explanation. There is no way out. There is no happy ending to this story. Welcome to the unknown. Welcome to eternal darkness.
Welcome to Charlie and the Chocolate Factory - The Ride