The sharpening might be a bit much. The power lines in the foreground seem to have halos and take slightly from the continuity of the sky. Otherwise, stunning.
Great colours, makes quite an interesting subject with the pylon in the distance ... would be cool if there were even more though. I find the processing a little extreme thought for my liking
The one thing I've noticed with tone mapping and HDR, is that if there is a line, the tone mapping breaks up the background. Kind of like the far left wire. The right side of the cloud is dark, but then on the left side of the wire it's light. So the wires make that part of the sky really uneven.
It's a nice looking shot, but the uneven tone mapping ruins it for me.