If you want to have a nice bottle of Champagne in an ice bucket on a stand behind the head table for yourselves I'd say that would be OK and fairly non-descript. Now, having said that, save the good stuff for after the reception. iirc about my reception and every one that I've attended for others since then the bride and groom are so busy with other activities such as visiting all of their family and friends, dancing with various parties, cutting the cakes, etc... that you won't have 30 seconds just to sit there and enjoy a Krug Rose. Save if for the wedding night or better yet the next evening when you're alone on your honeymoon. Do like cdr11 says (somewhat) and get yourself a good drinking Champagne that everybody can enjoy that is cost effective like a 1996 Duval Leroy Blanc de Chardonnay.