wdcon,
You may want to play with the SI beam and the QuadraBeam with the screen on 2d or split screens to see which one works best when you are on plane.
Now as goofy as this sounds, I have waxed the bottoms of my transducers and approximately 2 feet in front of the transducers on the hull with carnauba wax. I think this helps the water pass around transducers with less turbulence. Don't really know if this will help, but I did see some improvement.
George