Kodatech, yes the National Aquarium in Baltimore is a great Aquarium. We actually have done some of the exhibits there (shark and coral reef and several inserts). I have not seen the new Australia exhibit, but I have seen pictures and it looks great. We just got the contract to redo the original first phase of the Virginia Aquarium (we did the second phase) so we will be redoing several tanks there, including a large Red Sea tank.
So yes Baltimore ranks in the top group for me, also, even through it is old, the New York Aquarium is great. We did Sea Cliffs, Discovery Cove and individual exhibits, and recently we redid their Beluga tank to a Belize Coral Reef.
Dave