Scientifically speaking, I don't think any of them are truly viable, but then again I rarely take anything narc says seriously. The oscillating universe theory is impossible (big bang, big crunch, big bang, big crunch, etc), or at least the oscillation has come to an end in our universe, as ever since 7.5 billion years after the big bang (as I have repeatedly stated), the universe's expansion has been accelerating (and the rate of acceleration has actually been increasing with positive jerk). This makes it impossible for the universe to ever collapse into a big crunch. Also bear in mind that most advocates of the oscillating universe theory fail to explain what causes the big bang, after the universe recollapses, with the possible exception of string theorists.
There is another, rather interesting version of oscillating theory which came up recently. It is perfectly viable, to an extent, as it does not involve the universe ever recollapsing. But i'll save it for another post, shall i?