Let me know when you are back in town to check out the bank walls...
One thing I remember from the interior, it isn't set up like a traditional gallery space with long open walls. There are a few places where you can put three or 4 11x14s together. But there are also several smaller walls/spaces where one print would fill the area.
As to the still-life as a punctuation mark, tall and thin would do that. But to me, if there isn't at least one other one in a similar aspect ratio, it might look like an orphan.
If you print it tall and thin, got anything else that can print same aspect ratio but rotated 90 degrees?