I just got back from a visit with a local printer I like. He does both commercial and fine art printing.
He prints on canvas, banner, metal, dibond, fabric, plexiglass, etc.
I've had a large format image printed on Dibond (2 sheets of white aluminum glued together with a very strong polystyrene core). It looks great but is an expensive option.
I was suprised to see fine art photography samples on banner material mounted just like canvas on a frame. Visually, there is no difference. You can only tell it's banner material if you touch the surface. The banner prints are much cheaper than canvas and the material is waterproof, ultraviolet resistant, durable and long lasting.
I went to see samples of back-printing on plexiglass. I think it might be a good media for my computer graphic work as it adds dimension and 'pop' with brilliant colors and sharp detail. Considerations:
1. It is among the most expensive media (36"x36"=$630, 18"x18"=$460)
2. They recommend either a traditional picture frame or 'stand-off' mounting (drill holes at each corner and mount it an inch or so off the face of the wall with mounting posts since you cannot attach mounts by gluing them to the ink surface on the back of the plexiglass).
Make a little trip to visit printers who have samples of the latest technology, you may find something you never imagined.
Best wishes!