RE: Is Starboard F-type good for me?
I am of the opinion that the first board you own should be one you can use and enjoy in 90% of the conditions you get at your local spot. Otherwise you won't get enough time-on-the-water to improve.
For 5-15 knots and 7.5 as your largest sail, a modern longboard or hybrid is the best choice. Something like the Starboard Phantom or the Exocet Kona would be good.
When you can afford a second board, an F-type would be fine, but first you need something that can go fast in light winds.