We are looking for a reasonably priced Champagne available in 187mL bottles. The idea is to serve them to people after our wedding ceremony when we all get on a little train ride - Champagne toast on the train. There will follow a cocktail hour and dinner. The train is just for a champagne toast and 30-60 minute ride with photos.

What do people recommend in the $10-15 per bottle range? I'd be buying about 100 of them.