E-zup...
www.ezupdirect.com
They're not the cheapest, but they are good quality and will take the abuse.
We've got two that we use for our shows and we always get a positive comment or two on them. Used the same pair for almost 10 years now.
When we came up with a new company logo about 4 years back, we got ahold of them and simply had new covers made up. The frames look and perform just like the day we got them.
Gotta remember that they will be a representation of you and your company, so you may want to steer away from the $100 pop up awning.
Just my $.01.
SP