Picture of the day (Cage)

This is a picture I took this last summer, It was taken at the St. Louis Botanical Garden. I shot it with my Canon 40D with my 28-105mm lens. I used Aperture and the plug-in Nik Silver Efex Pro to make it a Black&white. If possible use a program that was made for making black&Whites most photo editors just chop out allot (about half) of the data when you convert to black&white. I really like nik software, if you get a chance try a free trial.  I like the the composition of this picture, I went back and forth on making it color or black&white, I'm glad I went with the black&white I think it works better.  What do you think?