I've seen Bon Jovi twice at a new (well, built in 2000) stadium in Melbourne, called the Telstra Dome, and while it wasn't full either time, it was still unbelievably LOUD! Having a roof on a 55,000 capacity stadium is equal in terms of noise to a 80-90000 crowd. If I ever got to see a full show there, the atmosphere would be hard to beat.

However, not being hypothetical, I'd have to say that Munich was brilliant.