This seems to be an approach similar to what you're taking here, except you put an interesting twist on it by handwaving your appeal to spooks with stuff about "the unknown" and then claiming it is the more rational position. Once again: we know, as certainly as we can know anything, that the mind cannot function without the body functioning. Therefore, the idea that there is no experience after body death is a more rational position to take than anything involving 72 virgins, nirvana, reincarnation, or blah blah Bible Jesus magic.