Hi Dennis,
I suggest you to try Fuego VGR 25.
This is a softer blade, but not so much. See your weight and tallness, this would be great.
For Andrea:
Wahoo fin is a great fin, the brown color would be the right hardness for you.
But I cannot say that Wahoo fin is the right choise for Apnea, see that you would like to improve yourself to 35 mt.
Ciao,
Natalia