Thanks everybody for your comments, it is all very helpful.
I see 2 main opinions:
1. Those that really enjoy their Moses 633 for the same program I mentioned, and recommend it.
2. And those who think I might not need as big as the 633 (1250 cm2), especially if mainly flat water.
The 633 is 1250 cm2. Because I am <75kg, I thought it could be a little too big for me. So I was leaning towards 1000 cm2. Maybe a foil in the 800 to 1000 range would not lose so much in the low-end at my weight compare to the 633 but would gain in agility and fun factor (as you get better). I think that's what some of the comments were saying.
I am still a little hesitant to begin with a 800 cm2 foil though. For example:
Maybe after 1 or 2 years of practice, those would be the better foils to ride. But I am not sure it would be the better foils to get you there. But I may be totally wrong and 800 cm2 is more than enough to begin with. What do you think?
So maybe the sweet spot is 900 to 1000? For example:
A question about the Gong, in the description it says: "the Wing for the Pros and the highly experienced, who maneuver at high speed and pump when gliding". It seems this wing is designed for the surf, so it's craving for speed. Would it still be good for low-speed maneuvers and carving?
Has anyone some comments about the Duotone Spirit Carve
? I read some good reviews about it in magazines, in particular for the program I mentioned, but I'd like to hear what day-to-day riders have to say about it.