I agree with themeparkne, Cedar Point's site is really good, especially after the redesign. But you have to remember (as we've had discussions on this site before) that all the pics and so forth use up $$$ when running the site, and official sites have to have tons more information than what an unofficial site can have. They have accommodations, employement, calendars, events, prices, ordering tickets and/or merchandise, shows, press releases, etc... An unofficial site only needs to focus on whatever you want it to! :)
The only thing I'd like to see offical sites do it offer links to the best-of-the-best unofficial sites so that visitors can go directly to them as well. Of course, I know that isn't going to happen - why give away advertising? Plus that's what search engines are for.
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Po!nt of View: A different look at Roller Coasters.
http://www.crosswinds.net/~justmayntz/thrills/index.html