Perhaps to follow up on my own thread: I tried all five of the above roasts at varying times and find that they are all inferior to both saucepan and behmor roasts. The popper seems to take the zing out of the beans. When comparing the popper roast with the behmor or saucepan, its like tasting supermarket bread compared to home-bakes.
Perhaps Ive not given it enough experimentation, and from the feedback here it seems that plenty of people are very happy with their popper roasts. For now Ill stick with getting the best from the behmor, and even the saucepan will come out again tomorrow morning :)