I agree with Liza; the Orthodox Church is Christ's Church. I think a careful, honest examination of the history of Christianity will reflect that.
I think you should give other religions thought, but you'll soon realize like I did, that other religions like Islam and Judaism, are based on a denial of Christ. So, it's based on your belief in Christ whether you turn to Him or not.
Eastern religions have the same Philosophical, and meditative, contemplative practices that the Holy Orthodox Catholic Church does. But they have a different underpinning explanation as to why something is the way it is.
An example is Buddhism and Jainism.
They believe that whether God exists is a non-issue. They think that controlling human desire is the most important thing. The Orthodox would agree (I hope!) except that they would disagree with the method.
In Eastern religions, God is outside the equation. In Orthodoxy, God is the center of the equation. That through God, and with God's help, one attains Theosis, Sanctification, Enlightenment, Divinization. Whereas, Eastern religions say that this can be done by an individual's efforts without the help of God, whether he exists or not.
So, CHRIST is the main factor in the difference of world religions. If you believe in Christ, be Orthodox. If you don't... be a Buddhist. That is my train of thought.
Islam and Judaism is based on a denial of Christ, so first you have to acknowledge Christ, in some way, in order to deny Him.
Take your time.