Originally Posted by TourDeForce 
The extra reach is overrated in most wedding situations.
Originally Posted by leok You WILL miss a few shots if you can't go wider than 28... there is usually at least one cramped spot
However you can crop or zoom with your feet (step forward) to make up for not having 75mm...
My very limited experience as official wedding photographer (only 2 weddings as a favor to friends, and it will likely stop there
) agrees with both these statements.
I shot almost everything with a 17-55mm f/2.8 lens. In my case, using a longer lens would mostly have mean more room for other people to get between me and my subjects (except at the church, but even there 55mm very seldom felt too short).
I'd suggest the Tamron 17-50/2.8 on one body (+flash & diffuser), and the FA77/1.8 on a 2nd one if you can.
My "ideal wedding lens" on APS-C would probably be a 17-70mm f/2.8. Although I might find it a tad heavy
