hourman, ... RDcollins has given you some wise advice. It is a wedding, not a wine tasting social event. Almost all attending will be looking at the bride/groom and the rest of the wedding party. Do not spend a lot on expensive wine and champagne.
Keep in mind that for every twenty five people in a crowd, there is maybe, just maybe, one person that is knowledgeable in wine/champagne and tasting of it and how to in fact judge wine. So, out of a typical wedding of one hundred people there will be only four people that will be able to discern a great wine from a mediocre one.
These #'s are all made up by me but really are probably not that far off from reality. Spend $$$ on the food and decor.... not the wine. If you feel like having a fantastic wine on the table have it on the head table for the wedding party. But that is my two cents anyway.