Not on the fancy side, but the way my teenager eats cereal, I'd need giant containers and the ones that come to mind are those giant sized pretzel or cheeseball barrels from Costco or Sam's. Know what I'm talking about? Great way to recycle those.
Can I ask, is this a morning party? Or just because cereal is fun? It just makes me think of two things. When we went to our senior prom and post prom party, one of our friend's mom made us a huge breakfast. She set up fancy tables all over the house and it was fun, even if we were exhausted. The other time a cereal buffet would have been fun was graduation morning...my friends came and "kidnapped" me at 5:30 am and one by one we picked up the rest of the group and hung a big banner on our bridge and then again went to someone's house for breakfast.
What fun! I love planning parties.