[jclark003]

Understood. I would trying to ascertain if you even have a prop problem before going down the path of purchasing another set. If your problem is prop related from a financial point of view you may be better off having your current props worked over as opposed to putting another set on the boat and quite possibly sending them in to be worked. Of course this depends on the age and condition of your existing props and whether it is worth it to work them over (compounding problems). 

If you can record and post your WOT RPM and speed readings. Let the engines run at WOT for a minute or two to clean things out and build up speed. If you are way off the top or you have one engine dragging then it may not be prop related (unless you have added a lot of weight or a tower which would lean me more towards a prop issue). With that data a reputable prop shop can probably tell you over the phone if your props can be worked to get you to your desired engine speed or if not, what would be a good starting point in terms of pitch and diameter.