Is the 5D the biggest wedding camera? I see a lot more 1Ds III's and now the 1D X is here.
I've seen a number of women wedding photographers who much prefer the 5D MK II for its size. I have big hands, and like the big body, but it does depend on the person.
The 1D MK IV has had complaints from big name wedding photographers for its marginal low light autofocus. The 5D MK II is outstanding in low light with the center point.