What should I do with them?

[joeyz6]

Don't give that Margaux away, that's for sure! Drink it for a special occasion and savor every sip ... don't forget to decant. You are a very lucky girl.
By the way, to answer another of your questions, the Margaux is a Bordeaux, meaning it is composed of cabernet sauvignon, cabernet franc and merlot. The Cap de Mourlin is also a Bordeaux but comes from a different area, called St. Emilion, where the same grapes are used but (if I remember correctly) merlot is the more dominant varietal. And again, you have an excellent vintage on your hands and an excellent producer as well. Not the same level as the Margaux but I still wouldn't give it away.