Bill,
Thanks for the images. I understand the size constraint issues of the 23. Although I'm still waiting for some quotes for stock and custom wheelhouses, I think I'll also price out Isenglass on 3 sides with sides capable of being used as "wings" (swing out the side curtains and attach to the inside of the gunnels to reduce spray while under way. I've seen it done with EZ2CY, a heavy, not-very-flexible, but very expensive clear plastic.
With a hardtop installed, there's this approach too:
