There are more than a few models of marriage in the novel. First of all we have the Bennets (Mom and Dad); the married for love, but don't end up very happy togather. The Gardiners would be considered a "marriage of equals;" Mr Collins based his marriage on one of "convenience;" Lydia marries Wickham based on attraction(lust), which turns out to be a disaster; Bingley and Jane marry out of mutual love and respect; and Elizabeth and Darcy take awhile, but their relationship is also built upon love and respect.