I’ve to build a HTML survey builder application with an AJAXified user interface (i.e.Wufoo,...).
The typical survey will be multistep with multi-dependencies between form fields/questions, public access most of the time, and export results to PDF + CSV.
Have been studying/testing some PHP frameworks ( CodeIgniter, Symfony and CakePHP). I like CakePHP, but I read a lot of good stuff about Django and RoR (especially RoR for form building...)...
...so the question: which is the better framework to build a HTML survey builder?