I guess it depends what you think the most important human attributes are in a good priest.  I would think compassion, intelligence, a capacity to listen, an ability to mentor, a good spiritual life, organizational skills, are all important attributes.  I don't see that those are gender based attributes or limited only to those with external genitalia or would in anyway impact sacramental efficacy.  Now, if one thinks the primary attribute of a priest is maleness because the sacramental efficacy only happens with maleness because Jesus was male, then we have an impasse.  I suppose we have an impasse.