Personally, I'm pretty much in favour of the Nacra 500 series
That seems like a wise advice indeed. However, Nacra 500 is 100 lbs heavier than a F16, it is unclear if if can be sailed 1UP, and the price is very steep (north or $12K ??? fully rigged). Hobie has arguably cheaper/better recreational cats.
The attraction to the F16 class is weight and versatility. Being High Performance is a nice bonus for recreational sailor.
Work with me here... I'm trying to convince myself that I need one!