Ordinary wine does not deserve to be drunk.... so the cellaring discussion is in my view irrelevant. Having said this... ordinary does not mean non-vintage... but that has been covered by the posts above.

Regular bottlings of the large producers (Moet, Veuve, Pommery) are in my experience rather variable with production.... some smaller houses have a better track record, some that I would throw out for consideration are...

Laurent Perrier
Delamotte
Gosset
Billecart Salmon