Prop. choice Tornado 5,8m Merc 135 ?

[mercix]

Please help to select the best prop for my boat!
I have a Tornado 5,8m "speed Hull" with Merc 135 Hk. It is mounted without rise. Have tried Mirage 19", Trophy fourblade 23", both reved the meter out +6500 rpm. The Trophy made 50 knots.

I want a prop suitible for heavy load, low fuel, no cavitating in bad wheater, top speed is not important. What is the opinion of High Five ? I am thinking of a 26" and a little rise ?

[Joerg Winterfeldt]

What´s about ProPulse props? http://www.propulse.se/

I have one on a 40hp yamaha (4,20 rib) - great in rough water, best grip - no cavitation ...

Joerg, GER