nothing, nothing, nothing...big bang?

[Anomalocaris]

It could be, but what we know of the laws of nature, at the present time, is that the universe couldnt be uncaused.

No, I think what we know of the laws of nature does not suggest the universe couldn't be uncaused. It suggests uncaused quantum events occurs in the universe all the time, everywhere, down to the smallest dimension and shortest time. Hawkin's radiation is the result of such events. It also provides a similar basis for a rigorously describable, in principle experimentally verifiable uncaused origin of the entire universe.

When weighing different proposed first causes, Occam's razor applies still. Law of parsimony says a hypothesis that comes replete with numerous frills unnecessary for explaining the main thing it was designed to explain is unlikely to be the correct one. If a theologian were to par God down to just that thing which caused observable universe to come into being, then he could place himself closer to equal footing with other speculations for now. Although while there is no reason to think other speculations can not advance, it is hard to see how the theologians have room for anything but stay still. But when the theologian loads the concept that he thinks created the universe down with numerous enormously weighty frills unnecessary for creation, such as "trinity, goodness, talking to Adam and Moses, capable of, much less cares about, a relationship with you, impregnating a particular Jewish girl without the act of penetration", he bankrupts himself with his profligacy. Even if theologian insist on calling the thing behind each of these god, Occam's razors still says he would be stupid, if he cares about whether he is likely to be right, to assume the one behind one concept is the same as the one behind another.