I just had a little look at your old posts. I am curious: you felt doubt in the Prophethood of Muhammad (SAWS). Did you resolve this for yourself?
The problem is as Quran says, every recitation of a Prophet, the Satan casts regarding it. I thought some verses meant something, and therefore there were logical problems I couldn't solve in the Quran. But after reflecting and discussing it with much Muslims, I came up with solutions for many of them and some of them others helped me solve.
Then I took logical proof of God's praise, the exalted wisdom, what he would do with the best of his creation, and found this wisdom in Quran, emphasized. I knew guidance of the best people had to take place, but without religion, these best friends of God and their exalted wisdom is no where to be found.
I wish the argument that the Quran is unique in it's style could convince me, but, I myself don't understand this argument quite well because I'm not familiar with Arabic literature to well, and don't know enough how the superiority of the linguistic style of Quran despite reading what scholars have to say.
Although I read the Quran in Arabic, and find it beautiful, this argument doesn't convince me, although I know it is a proof of God upon his creation.
Instead I look towards the argument "Bring a book that is superior in guidance in it if you are truthful...", and I find the book with the best guidance is the one God revealed.
Having thought the Unseen reminder of God's Name and face, and the form of Salah with that, and the daily connection, I find this path most exalted, in giving purpose of ascension to God and drawing near to him by way of humbleness, attraction and awe/fear.
That combining with purifying the rule for God and wisdom, and striving for justice in society and struggling in God's way...I find the book emphasizes and manifests the praiseworthy path of his exalted friends.