This is one of the main questions which keeps me from deciding. I have heard convincing arguments both for and against the textual integrity of the Bible, and at this point I don't see as feasible the common Islamic position that the Bible is absolutely corrupted beyond recognition and take a much more nuanced stance. A lot of Muslims like to cite scholars such as Bart Ehrman in support of that position, but of course such a materialistic approach to textual criticism would yield similar results when applied to the Qur'an, as it has with certain revisionist scholars. We don't have original manuscripts of the Biblical books, and we don't have the original Uthmanic recension of the Qur'an, so the question is still very unclear, at least for me right now. Also, there is the question of the qira'at (styles) of the Qur'an. Both the Hebrew Bible and the Qur'an were originally written in Semitic languages and without vowels. The vocalization of the text was transmitted through tradition. With the Bible, one vocalization was agreed upon by the rabbis, while Muslim scholars preserved 10, which are somehow all correct. So, the Bible seems to win out here, or maybe I'm mistaken.
As for the denominational question, if I were a Christian, I would either be Catholic or Orthodox, and if I was a Muslim, I would probably be Sunni (though I haven't researched as much on the Islamic side).
Well, let me give you the core fact you can use to decide then.
In Christianity, Jesus was the Word (Or as we know it the mind) of God who took on the body of Man.
Jesus then died on the cross, whas ressurected from the dead, and received a body which was one of light, and not as we have today that is a rotting mortal carcass.
This is the whole story of the Gospel of Jesus.
God became Man to save us from death by changing our bodies into one of immortality.
Now, In Islam Jesus is a prophet, and some muslims would tell you Jesus is one of the greatest prophets of God.
Great! Now that we have the facts between Christians and Islam, let me show you the...
Islam check mate question!
In surah 4: 157, the Quran say that Jesus was never crucified, and did not die on a cross.
BUT IT WAS MADE TO APPEAR!
This is where the Quran destroys itself.
1. If the crucifixion was made to appear, it would mean the Quran say that the people who saw Jesus die on the cross, was witnesses to the event!
2. if they did see Jesys die on the cross, they did report this event truthfully in their writings, the godspels.
3. Then these people who saw the crusifixion never lied!
BECAUSE THEY ONLY REPORTED A GREAT STAGED SHOW ALLAH DIRECTED.
Now, the only way one would be able to get past this self destructing statement in the Quran, is if one can claim that the Gospel and Torah was a wholesale corruption.
But wait, This can not be because Allah clearly say the Gospel, and the Torah was a revelation from him!
Allah also say that NO ONE CAN CHANGE HIS WORDS!
Therefore, such a claim will also destroy the credibility of Allah, and have the same consequences on the Quran.
There you have it.
You can accept Jesus Christ as your lord and saviour, or you can join Islam and suffer to answer surra 4: 157!
Enjoy it pal.
I still think you are a Muslim in disguise.
But 4: 157 will sort the True you out.