My father graduated with Masters degrees in physics and mathematics, and he married my mom who only graduated high-school. My two uncles on my mom's side both graduated with degrees in Engineering and married high-school drop outs.
On the flip-side, I have a missionary friend from my old church, who had bad grades throughout high school, never went to college, but he married this chick with a Masters degree in Nuclear Physics.
Point being, level of education means diddly-squat for why people hook up. There are other factors that you have to consider.
I think wealth has more to do with it than education, but most people just meet and marry who they want, just happens.
You just have to put yourself out there to find them.