I quite like this picture, the details are superb, it is a great exposure that has been coupled with really good processing.
The one thing I do not like is the key stoning effect. My suggestion, if it is possible in the scene would be to move back, and use a longer lens. This would reduce, but not remove the key stone effect which causes the building to appear like it is falling over. Moving back would give more room around the edges which in turn would allow for a correction in Photoshop. As Photoshop C6 is being use, control "A" "T" would bring up the free transform corners. The correction could be performed on this exposure, but the sides of the building would be lost.