I tried to put together a list of available foils here: http://kitehydrofoil.com/index.php/equi ... o-buy.html
, but I have only tried the MHL, so I cannot really advise too much between the different ones.
What I can say is that any low aspect, non-race foil should work very well, and I suspect all the foils are very good.
Surfing waves or swell with the foil is awesome! A slower, low aspect foil would be best for riding swell, since you can really start to manoeuvre around and make relatively tight turns once you get dialled into your foil. Getting on a wave with the foil is an awesome feeling. At first it is a mission to find out how to slow down the foil and get the kite to drift correctly since the foil has so little drag and extracts so much more energy from a wave than a surfboard can, but it is so fun trying to master the waves on a foil.
If you are fortunate enough (and brave enough) to ride massive swell (the type that rolls in from kilometres, and scares everyone off the ocean except that one brave guy with a 1m long blade under his board), then you might want to find a faster foil, but one that is still manoeuvrable at low speeds. This size swell is rare, even in Cape Town in winter. I do not know which brand foil is good at this. Does anyone know? Basically a very fast lower aspect foil.