I'm good either/all ways, really. I like a Superman who ages super-slow, but I also like seeing old Superman or Superman who transforms into some other iteration, like 1M Supes. I do believe in Superman resurrection, just like I believe clapping can bring fairies back to life. Jon Kent had a heart attack and went into the deadlands and got his son back. We saw it on panel; I believe it. When Clark floats back towards sunlight, at the end of Terra Occulta, I want him to revive. Dead is dead, but that tautology doesn't mean much for a mighty man of miracles like Supes.
But, I'm also game for the idea that Superman dies, if the story warrants it.