Hi EB and welcome. I don't understand your "looking for a compromise" between the OI and the Valiant. You need a blue water boat for your plans. I also don't understand how a 37 ft. boat would be too confining for a single hander. I think that you are pushing the limits of what a single hander can deal with as you approach 40 ft.
There is a bluewater boat list sticky thread at the top of the boat buying forum. Check out some of those boats on line and then go hop aboard some likely candidates as the pictures are simply not the same as climbing aboard and poking around. Annapolis and Miami are two good places to see a lot of boats in a short while.
No longer posting. Reach me by PM!