Keep in mind that mfgrs of herp products and caging can go out of business quicker than quick, or else completely change their cage details, construction and materials used.
If you buy all 10 from one mfgr, you'll wonder if the other's cages would have been better. In 10 years, you will likely end up with cages from multiple mfgrs. What you'll realize then is this: all will work for you. I have cages from at least 5 mfgrs, and each cage works just fine.
In my mind, for larger snakes like boas and pythons, I go for strength vs weight of cage, within reason. HDPE cages are stronger and will last forever, but are heavier (still lighter than melamine.) PVCx are lighter but insulate a little better due to the properties of the foamed PVC.
The Pro-Lines are tough cages. They will outlast your snakes and possibly your interest. Boaphiles can last as long too but are just not quite as durable due to the PVC vs HDPE properties. I have a Boaphile from when he first made cages. Still going strong after alot of abuse, including me dropping it on its corner (I needed to repair a crack after that, but easy with PVC.) PVC is easy to repair and alter. I made vents in mine, drilled holes, filled holes I didn't need anymore, etc. Easy with PVC.
If you have lots of money, then look at
www.kingsnake.com/habitatsystems/
The Habitat Systems cages are the one cage that you just can't find anything to complain about. But you pay for that.
So, either buy one cage from each mfgr and decide for yourself, or just realize that any decision you make will work nicely, but you will always wonder if that other cage would have been better.
I think HDPE cages have better resale value, just in case you change focus and want to sell your cages down the line.
So now you're probably really confused!