Canon 5D Mk2 Stills at 6400 ISO - Wedding

As you can tell from my last post i was not that impressed with the 5D MK2 FOR VIDEO/STILLS at weddings. I will be posting the full video/stills fusion we did in a couple of weeks. Luckily for me Sharon made a great job of the video with the Sony camcorder and i concentrated on what i love PHOTOGRAPHY. I was able test the camera at ISO 6400 at F 2.8 with the 70-200 lens at the reception. I have mentioned in previous posts that i was not that amazed by the noise level at ISO 6400 and expected it to be better after all the hype from canon and certain photographers (who get paid by canon). As i thought the images were noisy but still useable at 7x5 print size. This is fine for the wedding album but you always have the problem of capturing a great image of someone and a relative wanting a 20x16 inch print on the wall. I am going to stick to the rule of ISO 3200 is the maximum for the 5D Mk11 and ISO 1600 is the maximum for the 5D. I have to say this is personal taste and with noise reduction software i can see allot of people having no problem with the camera at high ISO 's. Just to let you know the video mode at ISO 3200 is very poor and i would suggest a maximum of ISO 1600 in video mode for the 5D Mk2.