I like the harsh contrast you achieved in the image. Although you are right, portions of the musician's arms are too hot. You might actually need to flash the paper for this.
As to dirty border, (I'm sorry for being direct) I think it's a bit weird. I would suggest filing a bit more so you can get a nice border all the way around the image. Also, the way it's reflecting light, it is creating a halo around the solid black area. To me, it looks strange. On the 3rd image, you may need to burn the second half guy on left bottom so he doesn't grab so much attention. Similarly, two guys on the right on the second image, I'd burn them in a bit.