I was about to comment on how the part of the central tower where the clock is--looks wrong/out of place. A quick google search however shows a different version in which that portion of the tower blends nicely. Not sure how to post the pic here, but here's the link:
http://www.dargroup.com/areasofactiv...=21&pageid=108
I wasn't necesarily opposed to the clock idea aesthetically, it seemed to need to taper in that area if that makes any sense. Anyway, the render I'm pointing out here looks much better and it might be the final incarnation which is being built.