Being too chicken to build a gym myself (and also having several fractures in my spine from rock climbing). I like the natural looking one that have hooks for hanging toys.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=27050010697 The top of my Grey's cage is mayde 3' from the ceiling, so I asked this guy to make me a model that height:
I like how tangled and challenging it looks

My only question, though, is what woods you all consider the best? I've heard loads about manzanita(sp?), but some people seem to use dried vines, and other stuff. Thoughts? Opinion? Please?

If I'm going to buy ,not build and not end up with sticker shock at a price over $300, what wood do you prefer?
There are so many options out there it make my head spine Exorcist-style.