Jamie,
Your wedding photo does also look very similar to what I have been getting with my Ilford 3200, in terms of overall "look", although I haven't scanned any of mine. Very similar results with the TMax3200 at the same (800-1000 ISO). It -is- very coarse grainy film, no doubt about it. I have standardized with Ilford DDX.
There are lots of choices in F1.4 lenses, which is a good thing. I tend to alternate between my f1.5 Nokton, and Canon F1.2 with Fuji Neopan 1600, currently for inside rangefinder available light. The 1.4 Nokton is also a great lens, as many here will tell you.
For shooting wedding formals, I would recommend a medium format, on a tripod, with a flash. I used to normally carry three Hasselblads to a wedding, two portable with small attached softboxes for beautiful close-up light, and one for shooting on a tripod, during the ceremony. And also carried a rangefinder for making small, B&W prints.