Well, if you can find them, I'd think Tapinauchenius species - similar in requirements to your Avicularia but with a little more spunk, and slings fit your price range for most that I've seen. However, they are uncommon so you would probably have some difficulty locating them in an actual store.
Other than that, you'd have to think African arboreals such as Heteroscodra maculata or Stromatopelma calceata for the under $30 crowd but they are considered to be among the most aggressive and "hot" arboreals. You can find some Poecilotheria slings around 1" for your price range, but again, not exactly bambi
Unfortunately when it comes to arboreals, it's either the hippy Avicularia, Romulan Taphinauchenius, or Klingon africans and Poecilotheria.
Hi James. Man, there are so many awesome arboreals. I'd never be able to settle on one specie to recommend. I thought a good idea may be for you to surf a little and get an idea of what's available. That should make it easier for you to decide what you like or not.
Here's a pretty good one. It's Rick West's site. There's a ton of great pics there but not all species photographed are available in the hobby. I believe most are though. http://www.birdspiders.com/main.html
Here's Kelly Swift's site. He gives good info on his price list and let's you know right there next to each pic if it's terrestrial or arboreal. http://www.swiftinverts.com/
Also, if you check the links section here there are plenty of other sites to give you some ideas.