I just had some large photos printed by West Coast Imaging using Fujiflex Supergloss paper. One of them was 24" x 36" and the other a 16" x 24".
http://www.westcoastimaging.com/
That paper is really amazing stuff. If anyone is familiar with Peter Lik's work or seen any of his galleries, he uses Fujiflex Supergloss paper for his photo prints (as far as anyone can tell, he's not really forthcoming about the subject). Under the right lighting conditions, it's almost magical. It's almost more like plastic than paper. It sort of has a metallic look to it, but it's a MUCH more natural glow than metallic paper. As you physically move around the image, areas of shadow and light get brighter and darker that just gives it this interesting glow. It's impossible to appreciate it without seeing it in person. The one downside is because it has to be developed on a printer that uses light to expose the paper it's maybe not quite as sharp as inkjet-type photo printers, but unless you're comparing the two prints side by side you would have to be being really picky to notice the reduction in sharpness of the Fujiflex paper.
The two photos I had printed are these:
http://benckphotos.photoshelter.com/...000_abnzKx_s_g
http://benckphotos.photoshelter.com/...000_abnzKx_s_g
Also, from the same photo lab, I have coming a huge 30" x 45" print of my photo of the national anthem during the MLB All Star Game from Target Field.
http://benckphotos.photoshelter.com/...000y0WPnRXQA2M
I wanted maximum sharpness for that print, so I went with an inkjet based paper (I compared several proof prints to get just the look I wanted). It's going to be face mounted to acrylic, so there will be no need for a frame. I think the acrylic face mounting will really make the print pop.
http://www.westcoastimaging.com/services/#mounting
I spent quite a while trying to find just the right photo lab who could pull it off the best. So I can't wait to see it.