Those oceanic cats are really pricey...
Never thought of your boat as a floating dutch oven...but I guess it kind of is, with the greenhouse effect from the pilothouse windows.
I have a number of hatches that help, and the saloon and the aft cabin stay cool...but it's weird at dock when the A/C is keeping fore and aft chilly and having very little effect on the pilothouse itself.
I have screens, but I need to screw in snaps for them, particularly on the west side. I'm going to perhaps insulate the roof more, as well. When I'm sailing, it's fine, and the engine doesn't heat it up at all...it's just the sun.