Dear Voyager,
Dont become depressed over this matter, you are on the right track, keep going. I am in simalar position to you and this year had to re-examine everything and had a real good taste from the critics of Islam and being true to reason, logic, fairness and justice I couldnt look back.
You have taken some huge steps forward but it seems like you want to take a few steps back. You need to put this scientific error thing aside for a moment and look at it from the other different perspectives which you have already done I am sure. The fact that Islam is a system of intolerance, hate, control, subjugation, imposition, supremacy and violence against the whole humankind who do not follow and believe in its barbarity, in complete violation and infringement of the rights and personal freedoms of others, this alone is enough to prove that it is inhumane and has no placed in the civilised world let alone being from a divine almighty peaceful god.
I really recommend that you read the debates of Ali Sina on Faith Freedom if you have not done so already. He poses some really serious charges, challenge, questions and refutations which no one is able to give adequete answers and was instrumental in changing my views and I am sure it will effect your mindset too. He has a written debate/book on there called probing Islam, with a Moderate Pakistani Scholar Javed al Ghamidi. He has one book where he is debunking all scientific claims made by Zakir Naik which may be of particular interest to you, but I suggest going through the debates first with Yamin Zakaria and Javed al Ghamidhi amongst others. Here are the links, let me know how it goes.
http://www.faithfreedom.org/challenge.htmhttp://www.faithfreedom.org/debates/YaminZakaria.htmhttp://www.news.faithfreedom.org/downloads/probing-islam.pdfWorld’s Greatest Showman, Ali Sina on Zakir Naik: A review of The Qur’an and the Bible in the Light of Science
http://www.faithfreedom.org/debates/NaikCampbellintro.htm