No, I think you will adapt to the Futura 133 pretty quickly.
Just don't give up after the first 2 or 3 times you sail the Futura 133.
It has plenty of volume for a sailor your size to uphaul.
Going to a larger or wider board would take you back in the direction of the Rio M.
At first you will cuss and swear at the F 133 because you won't be able to uphaul
quite the same way you are used to doing on the Rio.
That will actually be the case!
Soon you will adapt how you uphaul to the different fore and aft balance required
and then you will be "on your way" to even smaller boards for higher winds.
Hope this helps,
Last edited by Roger; 21st November 2010 at 05:41 AM.