ready for more

Hi Guys,

I have played around with vaadin for a quite while and now I am ready to develop a real professional business application.

As far as I know the most RIA technologies are Microsoft Silverlight, JavaFx, javascript. Using vaadin will cause me any problem when developing my application ? Like next versions being too different that will be more difficult to update my code ? Or something you might think that can be considering when choosing vaadin I need to know the pros and cons.

Also I am currently using version 6.8. Do you recomend me to start using vaadin 7 already ? whats the difference ?

Thanks for the help and forgive my poor english.

Thanks
Gabriel