I have twin worked 330s in a 31 ' Excalibur, but just to give you some info:
Mirage 25s 3 blade
69.5 MPH GPS consistant (70 on a good day!)
Bravo1 26 4 blade
67.5 MPH GPS
Bravo1 s stay hooked up better so I always run em on Lake Michigan.
For flatter conditions I use the mirages.
Shouldn't this post be in Q&A?