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
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.