I definitely believe in some form of Heaven. I'm not sure exactly what I think it would be like. I do I think most people make it there, but maybe, if they still have things to work out from their life they go through a purgatory. I think of purgatory as an empty place, that becomes a your thoughts. Good thoughts will make it easier to get through; bad thoughts will make it a a place of suffering through your issues. If you can make it through that you can transcend into Heaven.
I make no claim that this is absolutely the way it is. I might even accept reincarnation under certain terms. But I do believe there is a safe place we can make it to eventually with a kind, all-powerful ruler. Once we've done all we're meant to do, we'll find it.