See, thats a fallacy or somesuch there. The speed of light cannot be defined as "maximum allowed speed" if you want to retain your ultimate complexity. Becuase, I highly doubt you invented the laws governing this 'fact' as you put it- hence, there are things you don't know and cannot observe or control (this maximum speed for one), leading me to think your not all that complex. You assume light has a maximum speed- why? Who set it?
Just because the concept of a "universal speed limit" is hard for you to grasp does not mean it is not true. It is the same type of argument that common men used centuries ago when they were saying the Earth was flat instead of round. They dismissed any scientist who said otherwise as a crack-pot. When the scientist would present evidence (such as a boat's sail sinking below the horizon through a telescope), the common man would come up with a superstitious explanation. Without straying off-topic, let me say that this is also the same type of argument used in attempt to de-bunk biological evolution. Not only must you give evidence when making a significant claim, but you must also give evidence when attempting to make a claim against the claim of another. "There are things you don't know and cannot observe or control" fails to be a valid argument on multiple fronts. For one, this could be used as evidence against literally
any piece of fundamental knowledge. For example, one could ask you "
Is this piece of paper white or is it black?" and either option you pick, they could invalidate your solution by saying "
How would you know, you haven't seen all the colors in the world. You don't know for sure, you might just be blind".
"
It might" statements are usually not accepted as valid solutions in a problem, especially when trying to maintain a scientific view. I student could answer every problem on a test their math teacher gave them by answering "It
might be one." for all problems. If you can accept that, then you can also accept that in order for us to get as close as we can to a "true fact", that we need to atleast get to a point of "Beyond a reasonable doubt." If you can give me some proper evidence against that logic, then maybe you should also go in front of a national senate and tell them the errors in their ways, as it would probably be much easier than trying to disprove Einstein's laws. If you really need me to explain to you the reasoning of why the speed of light is the maximum speed in our universe, then you can use wikipedia to find the answer; If google isn't good enough for you, you can go attend a high school physics class. If after that you still aren't satisfied, you can go take it up with college professors, but take my word for it that you wouldn't want to; Professors have egos which are more dense than boulders.
Also, light has been shown to have similar qualities to matter at a sub atomic level, showing that such as energy and matter are not different. For somethng to become pure energy, as you say, "if matter has energy...." how can it become something it already contains? Where does this extra, purified energy come from? Or is matter shed at such speeds?
Now you are starting to think similar ideas which the community of quantum physicists have been trying to bring accurate explanations to for centuries!

You'll have to pass your own judgement over the information that is available, but my own biased advice is to keep in mind that some of the information out there is more thought-out than other information, and you are going to find certain issues in which both debating parties hold adamant arguments. Try not to pick a side until the bloodshed is done.
Anyway, try and reconcile E=MC2 with the big bang- presumedly, at some point in the first microseconds of the explosion, matter had to travel faster then light which may or may not have existed. For tis matter that emnates light, as we see it.
Usually most physicists point out that it is inaccurate to describe the big bang as an "explosion", and that our current information suggests "expansion" as a much more accurate term.
In any sense, trying to use values of perceptual time when describing the big bang, would be seen as foolishness in any serious attempt of physics. A basic argument against your basic argument, is that matter and light can be in a sense "converted" into each other, and some models of physics go so far to say that the values between what is matter and what is energy are really oscillating, and a particle is never completely one or the other.
Very well then, first we must come to the understanding the concept of what "redshift" is. Redshift is when electromagnetic radiation has an increase of wavelength, and in turn a decrease of frequency.
When z is the amount of redshift that took place, then:
z = ( λ observed - λ source) / λ source
and
1 + z = λ observed / λ source
Basically, the redshift in electromagnetic radiation will increase the further away the observer was from the source. What does this imply? An object is moving faster the further away it is.
V = z*c
This is evident in Hubble's Law, in which the universe is expanding.
H = V / D
Where H is Hubble's Constant, the rate at which the universe is expanding. The acceleration of this rate is:
A = DH^2
This suggests a Spin-1 graviton is given off by all particles to all other particles, according to this :
http://coraifeartaigh.wordpress.com/2008/08/12/cosmological-distance-at-trinity-college/
After this point, throw in some of Friedmann's equations, which say our Universe either has a spheric spatial curvature, a hyperspheric curvature, or a flat spatial curvature.
As we can expect, there is no spatial curve, and recent technologies show just that. If there was a "spatial curve", then we could no longer consider it space, as it would have to add an extra dimension. This basically is saying "For an object with mass M and energy E, its mass and energy are inversely proportional in a vacuum." or even simpler, it is saying "All the mass in the universe is inversely proportional to all the energy in the universe." Tah dah.... Einstein's E=mc²
E is energy, m is mass, and c² is the value that raises a point of mass in the 3rd dimension to a point of energy in the 4th dimension, i.e. the speed of light. 1/c² is the value that lowers a point of energy in the 4th dimension to a point of matter in the 3rd dimension.
Our existence is an oscillation between matter and energy.