Just picked up a Birns and Sawyer matte box off ebay for a good price, but no filter holders and no rotating stage =(

Now I'm looking for the right filters to take to a wedding shoot. Particularly diffusion filters for that soft glowing look. Based on your experience, what filters would you recommend?

Polarizing filter to get some great skies for location opens or outdoor weddings. You could also look into some Pro Mist filters for your diffusion. They have some before/after comparisons at bhphoto.com depending on the look you want to achieve.