I 'm looking for a third party module that will allow me to build a survey, but support decision branching.

eg. A question on the survey might ask the user if he/she is a home owner. If the answer is 'No' then the section related to mortgage payments needs to be skipped.

Can anyone suggest a third party survey module that supports this functionality.

Any help appreciated.

Regards,

Paul.

agreed on both accounts - Enterprise forms provides conditional visibility (qestions or entire pages visible depending on value of a given form element) as well as conditional binding (element value becomes parameter for database call for another elements list of values). Work flow is deeply featured (create/edit user accounts, run stored procedures on any database (Oracle, SQL Server, more), notifications and cetera.

Can process C# and I will use a hidden element to do some complex comparisons of a few other element values to return a particular value and base visibility or binding parameters on what such code returns - so you can handle real-life complexity. 

Rich report manager.

Yes, as you can imagine, there is a learning curve.