my only niggle is the little lines in the vignetting, where the tone isn't as smooth as it could be. i've found one way to get rid of that is to do a very slight noise treatment to the gradient layer. that shouldn't affect the detail of the image, or appera overly noisy, but it helps to break up the lines between the tonal gradients.
Great shot. Not sure what the oval lines are in the background but I love the interest this shot offers in a challenge where some of the shots really aren't all that interesting. Nice placement of the barb too. Back to bump you up to 9.
Nice. I was debating entering a shot similar to this actually and went with something completely different. Hate to be typical but this might have really benefited from using 3rds, I feel the barb is too close to the edge. Could also use a little more contrast to pop the wire out a bit.