have a look at
Picasa Web Albums - Steve - Hard dodgers ...#
for a good range of examples.
The orange centre cockpit is a NZ designed Young 43, I doubt if this has full
headroom under the
dodger. They look very balanced
Have a look at the Van der Stadt
samoa 47, their
dodger looks very good IMO (there are several pictured in the above link, but not labelled) , but they have a step down in the cockpit sole to achieve full
headroom
I think if you have a high cockpit floor, then it will be very difficult to avoid looking like an apartment building if you want full
head room.
Suggest you ask the
builder to make a
cheap cardboard or
plywood mock up,
paint it the intended finish colour and
paint the intended window shape in black, then see if you can live with it.