Ultra boats are one of the best owner friendly builders that will give you friendly help with this.
John at Ultra is a cool as it gets and I'm sure he will dial you in to get lake tuned.
Most of us run 13x13 or 13x12.5. In my case, a cnc machined brass prop (worth the expense). Probably way outta range for your needs and type of boat.
I run 55mph with a 22 ft, 5600 lb Tige' with the 13x13. 51 mph with the 13x12.5
That half inch in pitch is huge, a ton more snot outta the hole.
Hope this at least gives you a bit of reference, I'm sure your size/pitch range is much different.
http://www.hotboatpics.com/pics/data...04_048-med.jpg
http://www.hotboatpics.com/pics/data...04_045-med.jpg