I love great display tanks, what you're planning sounds fantastic. Great project. They can be a real bear to maintain and keep clean, but if your collection isn't too big, they are more than worth it to have something that awesome to look at. Once you get that thing put together, you are definitely going to have to show it off... by all means post here and e-mail me a few pics.
What you describe reminds me of the Indianapolis Zoo Reptile House. They do a fantastic job with their displays and I would love to have the time again to set a few up similar to what they do. The thing is attached to an amazing desert biosphere with some of the coolest desert plants I've ever seen in a man made environment. The reptile house itself is rather small, but exceptionally well done and the display tanks they have in there for the snakes are incredible to look at. Nothing better at a zoo than a great reptile facility with well done displays.
Mike