I voted Extjs for Enterprise level applications. I dislike these posts because the more people learn about frameworks, the more you learn that they are meant for different audiences.
I've seen some very large companies use MooTools, Dojo, prototype. but for intranet level applications, Ext outshines them all!
It's like comparing apples to oranges. there is no context to 'better'.
Personally I am tired of people complaining about the licensing model, it really isn't that confusing. Last time I looked at it, it was pretty cut and dry.
"If you make money using ExtJS you got to buy a commercial license, if you don't make money, then you can have it for free".
I am with you dude! I mean look at backbase. Ext is a complete Bargain! you can use it in your app, as long as you don't sell it along with your code. What's so hard to ask about that? These complainers are just foolish.