“Don’t expect to get a boy that has been more frumer than you his WHOLE life.”
Why not? There is no shame in coming from a modern family. I know several Charedi couples who are “mixed”– one comes from a modern family and one grew up Charedi. It can go either way in terms of the guy or the girl. I really don’t think it’s an undesirable thing to have a family with a different hashkafa, as long as they respect you and you respect them.