I've personally come to the conclusion that there's absolutely no conclusive evidence for the existance of any god or gods. There's plenty of evidence that the universe, matter, and life itself could (and very likely did) come about independently as emergent properties of a system ruled by fairly simple physical laws. In short, if god created everything, he must've intentionally created the universe in such a way as to completely hide his involvement. If such a god exists, he'd certainly be kinda a dick if he was going to start punishing people for not believing in him based on a book written thousands of years ago by a backwards tribal nomadic nation.
Yes, the realization that you're not going to have a perfect life in the future is kinda a bummer. But wouldn't you rather realize it and act accordingly, than live your life just waiting for the next life, only to find that there's nothing there? If I'm lucky, I'll have 70-80 years (maybe well beyond that given the rate at which medicine is advancing) to live, love, have fun, and see good for my hard work. That's not a bad deal, considering I did nothing to earn it.
If the god of the bible does somehow happen to exist, then I fully expect to be rewarded exactly the same as the most faithful christian. If an omniscient, omni-benevolent god that practices perfect justice, and can read the hearts of men exists, then he knows full well that I arrived at my conclusions though pure intentions. I sought only truth, and was ready to believe whatever I found, and act accordingly. It's not by some selfish desire to sleep in on sundays that I found myself to be athiest. If I, using all my supposedly god-given powers of reason, couldn't come to the conclusion that god exists, then I can't imagine how he could hold me accountable for his failing to give me whatever I needed to believe in him. Any god that wants to punish me for being an athiest is a dick that I wouldn't want to serve anyway.