Our family, DH DD and I, are a middle class family.
From my own experience, I was raised with both lower class and upper class upbringing, since my parents were divorced and "street" smart is way more important to me than having "class". There are "classy" people that are trashy and vice versa. You can't buy an education or class, it's something you have to want to teach yourself, so unless your traveling to Italy in the near future or your children are curious about the world you live in and what you and your husband choose to do with your personal lives, then let them ask you when they are ready.
I plan on raising DD the way I was raised, immersing her in worldly experiences and teaching her how to change the oil in her car. At the end of the day, it's what information that our children retain is what will stay with them for the rest of their lives and if something bad should ever happen in this world, her knowing how to filter water will be more important than her knowing another language she will not use in her daily life.