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Pushing the sharpening that hard and then upping the NR will lead to a watercolour type of effect.
Do you need to be so aggressive? What is your final output, web? Print?
If you use masking when you are sharpening, you can avoid sharpening things like the shadows and such that will only end up looking like noice. Hold down ALT (I think it's ALT..maybe CTRL) while moving the masking slider and it will highlight the edges it will sharpen making it much easier.
Also, I agree on the contrast. I'm not sure I'm crazy about the comp, but I understand you wanting the Wilburs sign in the shot.