I voted heart/lung only because of the options you listed that is the only one I would take. I think you should have added high shoulder to the list. I think a lot of guys go for the shoulder instead of the lungs because you have a better chance of dropping the deer where it stands. Even if it doesn't die, you broke it's shoulders and it isn't going far if anywhere.

I haven't taken a shoulder shot, but would consider it. I would never intentionally shoot a deer in the neck with any weapon. Nor would I try to shoot one in the head.

Only my opinions though.

Paul