I think my favorite I've had so far is 88 Rose Magnum Cristal, edging out 96 Cristal by a bit. However, I think that was just in my head because of the cost. Maybe I just don't have a good feel for it, but I can't tell the difference much between 88 Rose and 96...so I went ahead and got more 96.
Any recommendations for other champagnes? Always looking to try new stuff.