I am looking a some Pierce Arrows to consider for purchase. I seem to recall reading somewhere that there were some models that were, shall we say, not quite as good as some other models. From what I have seen, P-A was all over the place with model numbers, engine sizes and wheelbases; so it can be a bit confusing trying to compare models from different years. I cannot remember where I read about the different attributes of the different models, so I'm asking if someone can either steer me to some place where I can read about the relative merits of each model; or, alternatively just tell me which models are thumbs up and which models are thumbs sideways (not down). Models I am currently looking at are 845, 80, 1601, 133 for what that is worth, but they may disappear and a new model enter the picture. So maybe better if someone can just point me to a reference source where I can read for myself. Thank you.