informative video, not specific to 80 but may help in decision making.
http://www.youtube.com/watch?v=nm6vWMq61lA
http://www.youtube.com/watch?v=nm6vWMq61lA
http://www.youtube.com/watch?v=nm6vWMq61lA
http://www.youtube.com/watch?v=nm6vWMq61lA