The very fact that you and millions of Christians need to make the choice over which version to accept should really demonstrate the silliness of trying to argue for the infallibility of the bible. Which bible?
Mephis,
In the very beginning Satan told a lie. He misquoted God. To think that he would not continue to launch attacks on the word of God is ridiculous. That is his gig, lying and deception. Sinaiticus & Vaticanus look like chicken scratch. Everyone agrees that they were altered over and over for centuries. When you throw them out (and the 10% that are based upon them) you are left with the remaining 90% which are in virtual total agreement.
That settled the issue for me. If you want to believe that we can't know the truth, go ahead. That is certainly your choice to make. I have no problem with that.
However, just by studying the early church fathers and their writings (and they wrote A LOT) in just the first 3 centuries, it is easy to determine exactly what sound doctrine is, where and when heretical doctrine came in; and who was the culprit.
The early church fathers usually wrote a letter and quoted much scripture to warn congregations about the error. To illustrate just how much the early church fathers wrote, ALL of the New Testament can be reconstructed from their writings.
Here's an excellent book on this topic.

If you took all their quotes, WHICH PREDATE SINAITICUS AND VATICANUS, what you would end up with is the Majority Text - Basically the readings in the King James Bible.
Regarding the contradictions you claim in the New Testament, I have researched most claims and found them to be baseless. You got one you would like to discus? Open a thread, I'm game.
BTW, the TRUTH is a person