Zack has resolved his kit down to Canon only after shooting with both Nikon and Canon for a while. It's an interesting read, he sure doesn't like the 24-70 much!
http://zackarias.com/for-photograph...witched-to-canon-world-still-turns/#more-2583
http://zackarias.com/for-photograph...witched-to-canon-world-still-turns/#more-2583