One of the benefits of membership in Canon's Professional Services program is the company will send you evaluation gear to test. I had been curious to try the 50 megapixel 5Ds camera and had one sent to me.  It's a little sluggish and the file size is very big, but I liked the extra resolution.  This shot of the Louisiana State Capitol behind the Old Arsenal Museum is my favorite from the test shots I took.

Louisiana State Capitol & Old Arsenal MuseumView of the Louisiana State Capitol and Old Arsenal Museum through an arch of bamboo.