prop selection for WOT

[fishstu]

My 20ft MA with a 2001 Merc 150 EFI outboard has a SS Mercury Laser II 19 inch pitch prop. In most conditions the engine at WOT will not go over 5000 rpm. Otherwise the prformance is fine. The WOT rpm should be 5500.
I would like to hear from folks with the same hull/engine set up which props they have and what is the WOT performance. Also any advice on an other prop selectiopn is welcombe.
I have been told to try a 17 inch version of the same prop.