Distance is an issue so my dream place to go would be Tokyo Disneyland/Disneysea
Although I love coasters, theming does play a big part ofwhat I look for in a destination. You could put the world's best rollercoaster in a parking lot, but without the theming, a variety of other rides (water, dark, drop etc.) sights, smells and overall atmosphere, I wouldn't go out of my way to visit. That being said, visiting Coney Island to ride the Cyclone would be an awesome destination as New York city probably has something to appeal to anyone's tastes. As long as we're dreaming for free here, I'd consider adding a sporting event or two in the mix as I'm a big sports fan and love the feel of the "new" stadium/arena experience.
Is it possible? Not today. But if they're reading...what a great adventure, eh?