JSF Alternative

Dear All,

I have experience with JSP, Struts and JSF all. But from last 2 year I was apart from development. Now I got a new project.

I started with mojaara JSF 2.1 and development is quite fast until I don't need to integrate javascript & servlet.
e.g.
when I tried to make 1 fileupload with JSF. it sucks.
when I want Ajax call on <select><option>One</option><option>Two</option><option>Three</option></select> again I have to work 3 time as compare to if I want the same in JSP.
...

I tried library like primefaces but then the problem of CSS is stopping me. it 2 difficult to change style-sheet for each component.

I am not too far from starting point. So I need advise from all expert that should I continue with JSF 2.1 or
basedon my scenario where javascript and css and ajax call is heavily required switch to simple JSP.

regards
Syed Saifuddin