To try to answer your question - I think there were a lot of factors why this is up there. First - Kolat and Ironside were HUGE names at that time and the hype was thru the roof for this match. Second, Kolat was on cruise control and rarely had points scored on him. Them Ironside just went to work and stormed back scoring late to take the lead. Finally - it was in Iowa so the crowd factor played a lot into it.
Of course - it's all a matter of opinion, so nothing to be confused about - I'm sure you have one that's better in your mind.