One of the things I didn't see mentioned in anyone's suggestions / wishlist is a window that won't condense moisture.
Years ago, when I used the overflow from the spring that fed our home water supply to feed a 130 gal tank for native cool-water fish, the glass always stayed covered with condensation. When I created hot tanks for petiolaris - same thing (but in reverse). If I have a tank, full of plants or critters - I'd like to see them. This is especially true if the setup is in the living room. Who wants to look at condensation-covered glass (not very interesting)?
I'm thinking double pane glass with a dry, inert gas between the panes (like windows) but I'm curious if there would still be condensation. Does anyone make an aquarium for cool water fish with a 2nd layer of glass or any orchid enclosures with 2 panes? Has anyone solved this issue?