good fats dont effect body fat?? huh??
calories are calories.. you eat too many good fats youll get fat, i promise lol...
but yes, as a rule you should balance out your saturated/unsaturated fats..
the only fats you would avoid completely are trans fats (though studies have shown certain people have already created an enzyme naturally that breaks it down, gotta love evolution and the bodies adaptability)...
remember that its not that we want to avoid saturated fats, but control them.. saturated fats play a very vital role in the bodies day to day funcitons (including natural test production!!)