If you want to use on the most bigger wind range as possible, the Serenity and the Formula 162 will be the choice with an 11mē.
You can use the Serenity until max 10 knots and after go for a F162 until 30 knots. The 9mē and small formula will be too small to have decent result on a FW race course.
An iSonic 133 is design for light wind slalom, not up wind machine even we can do a correct one. But over 20 knots with 9mē that will be difficult.
The F162 is design for 6 to 35 knots on a FW race course.
All the best
Last edited by Remi; 19th March 2008 at 07:11 AM.