The sepia tone is really good to this piece, I like it better than the colour version as well. It goes well with the gargoyle and tones down the feeling of modern town behind it, makes it more timeless. Nice.
A good gargoyle picture is so hard to find. They're such excellent figures to capture, but so difficult to capture at a good angle. You have succeeded, though. This is a great shot. I love the use of sepia tone - it adds to the gothic feel of the image.