16x20 Paper Instead Of 11x14?

Keep on running this New Orleans deal through my mind. If I can do 16x20 swiss clip acrylic frames, then I can print on 16x20 paper. Maybe the image size could be 13x17 with a small 1 1/2 inch over mat. That might look quite nice with a black edge neg border and bright acrylic. Larger prints usually look a bit better. This would also work if I  mounted the paper to 16x20 aluminum sheets.

Richard Avedon "American West" photos mounted on aluminum