Yammi 200Hp Best prop?

Which prop (Brand, Pitch) is most suited for my V20 with a Yammi 200, if I want:
1. Highest top Speed?
2. Best fuel economy?
3. Or a good combination of above?

I would appreciate your comments, i belive that there are money to save herer.

Fuel price in Sweden:

1 US Gallon (3,79 liters) = 5,47 US Dollars