If you need the camera, buy it. If you don't wait. There will always be something better and more expensive if you wait though. However there have been rumours since April about a replacement. Whatever camera you buy there will always be a replacement on the horizon. If Canon do replace it with the EOS6 or whatever, I can guarantee that the changes will make no difference to your photography. It is the person holding the camera that makes the picture not any addition that you will probably never need or use. Personally I wouldn't faff about and would get it now and start using it.