In the Monday thread I saw you posted about possibly using silk flowers for your centerpieces to save yourselves some $$. Not sure what your local shops are charging, but we used
Afloral (linked) for our silk flower centerpieces and we spent a total of $300 for 18 tables worth of flowers and the silver containers to arrange them in. It's more work for us, but the money it saved us helped us out tremendously.
Shipping was fast and the quality is way better than anything I found at AC Moore or Michaels.
Just a suggestion!