Regarding this stand:
Hanging Java Gym/3-Tier/Bamboo Amazon Size, we carry them at the store - from mini to extra large, which is what is pictured here. Just so that you know - they weigh a ton but the birds love them! I would estimate they weigh a bit more than 11 lbs, unless they are a different from the ones we have. I'll put it to you this way - I can't lift them. Do you have a beam in the ceiling that you can attach it to? You will need ceiling protector also to stop your amazon from traveling to the ceiling and eating it. However, like I said, they love these!
The manzanita stands are great but I would recommend a sand-blasted stand as they are not as slippery.
I fear that the PVC stand you are showing may not have enough "activity" and your amazon may get bored.
Sorry to be so negative - I just don't want you to spend your money on something with which you may not be satisfied. Take it from one who knows - I have a garage full of useless stands that ended up being a waste of money.