There are a lot of good cages out there.
I think the plastic in the Pro-Line cages is second to none, however if I didn't have my Pro-Line cages from Constrictors Northwest, I'd probably go Animal Plastics.
These are my Pro-Line cages.
http://i772.photobucket.com/albums/y...a/IMG_2657.jpg
http://i772.photobucket.com/albums/y...a/IMG_2640.jpg
The plastic is HDPE plastic and it is durable and safe. All cages are priced INCLUDING the shipping cost.
Monster Cages are made of the same plastic and are another option.
AP cages are very attractive looking and of the cages you listed, I'd go AP.
BUT,,, my first choice is Pro-Line.
You really won't go wrong with any of the well known brand names in plastic caging.