Hi guys, i'm new to this forum so i don't know if i have posted this in the right section. I've been meaning to get either one of these cameras but not sure which is better? I've looked at the specs and they look pretty similar. I have a 400d and was wondering if my lenses will be able to fit on these bodies? I have a nifty fifity and a kit 18 - 55. I will soon be acquiring either a sigma 105 or a tamron 90 too. Any help will be appreciated. Thanks guys.