I picked up a cactus trigger on the weekend and I got to test shoot a 5d mark 3 at Downtown Camera in Toronto. Sorry, I forget the price but man does it have much quieter shutter than my 5d mark 2! Anyway, just thought I would mention it. I am not affiliated with this store in any way shape or form, although I do buy my equipment from them. I hope it is ok to mention this in the forums. Sorry, if it is not.