I have a few Dragonstrand. Good cage and the materials are better than average. The dragon ledges are the real reason to buy one. Just depends on what you want, can afford, can do.
Some people build their own cages, I did decades ago. Problem with that is if you don't get something just right. Say a sharp edge or something sticking out with the metal screen. I saw plenty of injuries from customers who built their own stuff and might have been better off spending a few bucks on a well made cage.
Some companies make their cages from materials that rust easily, you do want to look into that before dropping the money. Dragon strand cages don't rust. So different companies make different stuff, do a little homework like you are doing now and here.