You didn't say what you intend to do with the boat you settle on but IMO an electric windlass
is not a luxury if you are going cruising. Neither is some form of mechanical steering, be it vane or autopilot
, especially if you have to single hand, even occasionally. I see quite a few boats with the windlass
actuator at the helm, and I can see the advantages, again when single handing, but there some serious dangers in that luxury for sure.
As to the boats, I agree with those above; there's no advantage in a double-ender that I can think of other than if it has an outboard rudder upon which you can easily and cheaply mount a trim tab wind vane.