The problem with this is that rationality is not warm, fuzzy, or comforting.

I'm a possible outlier, but I find rationality warm, fuzzy, and comforting. I read a cool article on LW that explains something I didn't understand before, and I go "Oh, wow! Cool!", and it improves my general mood afterwards for a few hours or so.

A lot of this effect is probably due to the fact that I've been an atheist for a long time, so I'm not really losing any comforting ideals by engaging here. But, although it's hard to compete on the warm-fuzziness scale with an afterlife, we do have something that comes reasonably close: guilt-free transhumanism ("Not only should you get cryo-preserved and/or support life-extension research, but you should be kind of annoyed that it's not already commonplace.")