If you are going to roll, a few other things I've read from http://www.panamas.co.uk/hats/hat-care-and-hat-rolling/
1. Buy the white panama, not the natural one
2. Need a finer grade weave. Thus, the 25 dollar Panama Bob just won't cut it.
I am finding that the photos of the Cabalero and Ceuncano blocks from Panama Bob's website make the wearers look like amateur golfers, as the height of the crown is bloody too high. I would be more inclined to order the Havana....