I would get the photographs printed on canvas and wrapped. I would order them in all different sizes- starting with the large 36 x 48- but then going smaller. Use a nice mix of different sizes.
Can you picture it? The art that you had selected was nice, but not enough for a large area like you have. There needs to be more interest in a waiting room type situation.
On your walls I would use this Mica Chip wallcovering. I also liked it in a light blue. This would be your element of the unexpected. It brings in nature, but also has a contemporary edge to it.
For your flooring, I would do a fusion bamboo- like this one from Green Wood. The high contrast in your room, dark colors mixed with the white will be a sharp modern feel.