brown is another 'neutral' color that works with black and white scheme. Would be helpful if you can provide photos or links to the samples you have chosen.

The first thing I would do is switch your light fixture to track lighting. That way you can focus the light onto that wall much like what is done in an art gallery. I also think that may stop the reflection you are getting. I think putting cabinets on the long wall will really close in the space. I would make your red wall your gallery wall. I'd frame everything in white so they "pop" off the wall. The problem with the other wall being the gallery wall is that it's just to narrow. You can't really stand back far enough to see the art.

Once you go white (which I think is a great idea) you might find that the existing handles look good. If you want to change them I would suggest handles that are consistent with the period of the house/kitchen. And, I would keep them simple based on the design of the cabinetry. :-)

I was thinking maybe a pergola so that you can still enjoy the sun when necessary but have a small area where you can just relax with your family. What were you thinking?