Becoming a muslim is actually the best hedge. The qu'ran says all who do not believe in allah go to hell, without exception. It also describes hell in some detail, so there's no room in islam for belief in allah without belief in hell.<quoted text>
So, you're a Muslim? Or did you settle on some other god(s). How much time did you spend actually studying the different theological concepts available? Did you consider Jainism, Buddhism, and all the Eastern philosophies?
Or did you just settle for the one your parents told you is right without any real thought beyond that?
The bible, on the other hand, is more cryptic about hell. There's a small number of christian theologians who doubt its existence. Still other christian theologians believe that good non believers can go to heaven, under certain circumstances. Still others believe in the third alternative of purgatory, where lesser sinners can atone for their sins, presumably including non-belief, and attain heaven.
So, assuming you've led a good life, a muslim finding himself face to face with the christian god would still have a shot at not going to hell. A christian confronted with allah at judgment, on the other hand, has no shot at all. If the goal of the wager is to maximize your shot at heaven and minimize the chance of going to hell, the best shot would be islam.
Of course, the wager assumes that one can actually delude oneself into believing something that you don't think is true, and/or that god is either not omniscient enough to detect insincere expressions of belief, or so vain that he values flattery over honesty.