I decided to upgrade my FSW to a wave board last year.
I used to have the 92L JP FSW 2009
Upgraded to 92L JP Single Thruster 2013
At 90 kegs i found that the Thruster works really well in average Perth conditions
Planes nice and early and turns nice on the wave.
Sail size 5.3m - 4.8m can go bigger or smaller quite easily
I've played around with fins set ups too.
The bigger 22cm single fins for Jumping and onshore mush and the thruster set up (18 + 2 x 10; 17 + 2 x 12) for more down the line stuff.
Pretty happy with it but yet to test it out in any waves of real consequence.
http://jp-australia.com/2013/products/boards/single-thruster/www.windsurf.co.uk/test/jp-australia-2013-single-thruster-82-pro-edition-review/