最佳javascript/UI框架EXTJS vs HTML 5 vs其他框架

我们有一个基于flex框架的应用程序，它具有非常华丽的外观和感觉功能，由于flash的优势，用户希望有一个替代框架，它不依赖于客户端机器。

该应用程序是在ExtJS 3.3上新构建的，它也具有华丽的外观和感觉功能，但很快我们就面临着ExtJS应用程序的性能和自定义行为方面的问题。

现在，我们真的在delima中继续使用现有的ExtJS应用程序，或者在纯html、dhtml、HTML5等基础上从头开始构建应用程序，在那里我们可以根据自己的方式定制组件并提高性能。

请分享关于的最佳框架

1.业绩2.定制灵活性3.维护

Edit1#在做了大量研究，会见了从事各种JavaScript框架工作的人，并在真实场景中工作，其中差异实际上已经显现出来，下面是我的研究

ExtJS
1.  ExtJS (The latest version) is a MVC based framework based on Yahoo YUI, it supports the     concepts of MVC in JavaScript and is a well tiered framework with good extendibility and support.
2.  ExtJS has good documentation and active forums.
3.  It comes in both paid and free version , offers paid support also.
4.  ExtJS 4.x has got a major revamp from design perspective and improved in terms of performance 
5.  To be comfortable in Extjs , if is required to have a good knowledge of JavaScript 
6.  If you have to use a good MVC framework in enterprise application use ExtJS 
7.  There is greater learning curve in case of ExtJS

jQuery
1.  jQuery provides a good library with css based selectors promoted by Microsoft
2.  jQuery also has good documentation and forum support
3.  jQuery is open source ,you can make your own plugins and contribute
4.  jQuery is quite lighter and fast in terms of performance .It does not follow the MVC framework , the code sometimes appears cluttered when really complex.
5.  jQuery is easy to understand as it is based on css selectors , follows the rules like css (quite similar)
6.  For common tasks in JavaScript it is the most suitable framework, well suitable for ASAP projects.
7.  The learning curve is not that big, it is quiet easy to grasp, even in case of novice developers.

如果我遗漏了什么，请随时添加详细信息谢谢Abhi