Make Like a Bird?
You've really only got a few choices when it comes to getting a bird's eye view of Manhattan. Helicopter flights are easy to find over on the Westside Hwy or just grab the tallest building that might be passing by and take that elevator UP!.
The best choice is probably Top of The Rock atop Rockefeller Center. At least you'll get to see the Empire State as well. On a good day the visibility is endless, you can even get a yearly pass to just head on up there as much as you like, maybe you'd like to compare sunsets.