RE: Help with recreational Formula Board choice...
What is the windspeed range you are talking about when you say "light wind"? Some sailors who have to fight tides, currents or waves think anything under 15 mph is light wind. Some sailors like me think any wind strong enough to get someone planing is a "moderate" wind.
My guess is there is far less difference between an Apollo, an FE160 and an F-type 158 than there is between winds of 8 mph and 12 mph. At a general condition of 12 mph (fluctuating between 10 and 14) maybe they generally all plane with a 9.5 and your weight. At a general condition of 8 mph (fluctuating between 6.5 and 9.5) maybe only the Apollo generally planes with a 9.5 and your weight.