Well, I think marriage should be between a man and a woman. If you want something else of same legal status for gays - then go for it. I'm not saying straight out "LOLNO gays shouldnt be able to get married", I'm saying that gays should be able to have a marriage-like thing, but I think the definition of marriage should stay as a union between a man and a woman.
To be less serious, we can call this equivalent of marriage a "kwyjibo", for example. Gays can have their 'kwyjibo' and heterosexuals can have their marriage, and both are equal - except in name of the actual thing.
There.