Great Wilson - that explains, and people (we) can forget about the idea of "an okay gap you got now" - as you need a kite in between, definitely
Got too little experience with the foils - compared to other kitesurfers, so sorry, can not comment.
Have flown a lot with the Psycho4 in 12m2 years ago, and a few times with a 10m2, and then the 19m2 Silverarrow - but thats it...
Understand fully now, that you want a kite in between - as you dont use these in the same "lightish" wind like lighter riders, so a 14-15m2 will be the awesome "go to kite" that works for you a lot of the time, and dont feel big and slow at all
Peter