I was thinking of putting this picture (my most successful challenge entry to date) up for sale on dpc prints. Unfortunately there is no room for cropping to a suitable shape on the original, so I have to add a border. I'd love to know people's opinions as to which one suits the picture better, or any alternate colour that might work.
Have you tried the other colors in the shot (i.e. silver/gray, green, yellow/orange) ? I think the black is a bit heavy - could be that the thicker boarder on top/bottom adds heaviness and, because it's not symetrical, draws attention to itself.
I would try putting a thin black border around your image and leave the rest of it white. You also need to find a print size ratio that works better so your border area is more even around the image.