I wish I had a source to back this up, but from what I read in college from my Sociology classes... statistically speaking men tend to marry (or are attracted to) women who are below their socioeconomic status. Call it a protective mindset, men like to feel like they're in control.
I generally don't pay attention to that. I just want someone I can click with, e.g. physical attraction and chemistry.
And you are a very smart man for that. Society is changing. Gender equality reforms are still taking place as we speak. Most of the statistical data is outdated before they even start collecting it. Go with what you feel is right. Our gut instinct rarely lets us down. It's that same instinct that tells you to snap your hand away from the flame, before your consious mind ever had a chance to process the presence of the flame. Good luck!