Besides as far as I remember having two dragon riders in the same screen didn't slow down the gameplay so horses should not too (I guess <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />) Though it may be different in 3d

''''He who fights with monsters should look to he him-self does not become a monster. And if you gaze long into the abyss, the abyss also gazes into you.'' -Friedrich Nietzsche