Yesterday I was out walking and then up on a friend's roof and was able to catch a number of Chicago's most prominent buildings in a single day.
This is a view of the Aon building (formerly the Amoco building) which is the tall white building in the center next to the "new" Prudential tower on the right with the triangular top and big spire. I believe but am not sure that the building left of Aon is the cool new "Aqua" building - here is a link to a site with interesting pictures of this skyscraper. The beige building in the foreground partially blocking the view is the NBC Tower with the peacock logo but you can't see that from this angle (we are looking south, and the logo is on the west side of that building).
Here is a picture of the almost completed Trump Tower, with the iconic Sears Tower (Willis Tower?) in the background, at sunset.
Here is a nice view of the Hancock. I managed to get the whole building in the shot, including the tall antenna.
Here is a nice view of the interesting Sofitel Hotel. The building was designed to be eye-catching and it certainly is, with that angular front that goes out over the street.