Dave, I get the thunder and lightning analogy, but I guess I see it as we have advanced a fair bit scientifically and while I am in no way science saavy but I like to read and I know of no theory based on scientfic principals that even would begin to explain matter from nothing, that in a vacuum canister energy/matter would suddenly spring into existence. By our own scientific theories that just isn't going to happen.
But, ultimately I agree, there is just too much we don't know, too much to dogmatically argue for or against there being a God. I lean towards there being a God for reasons of my own which I foist upon no one, nor do I feel the need to defend, like my love for my daughter those feelings just exist.