1. The complexity of our planet points to a deliberate Designer who not only created our universe, but sustains it today

Thats debateable. Scientists have the theory of the big bang pertty well figured out. You are looking at the world through the human perspective where things are "made" and "designed". When in nature, things just happen. The "sentience" of the design you speak of exists in the form of evolution and natural selection, as creatures and plants adapt to changing circumstances.

2. The human brain's complexity shows a higher intelligence behind it

Again, thats from a human perspective. The designs of many other tissues in nature are also quite complex, but the theory of a designer doesn't hold up. Living tissue is quite vulnerable to trauma and cannot survive long without oxygen and water. Where a "designed" thing such as a computer is much less vulnerable to trauma and can be re-started in the event of a power failure. Think of the evolution of brains this way: billions of years of trial and error using the natural substances that life evolved from.

3. "Chance" or "natural causes" are insufficient explanations

Humans have no concept of "not life". Science has not excluded the possibility that life on Earth arrived from somewhere else in the universe, such as a comet. Science also contends that much of Earth's water supply is from comets that collided with the planet billions of years ago.

4. To state with certainty that there is no God, a person has to ignore the passion of an enormously vast number of people who are convinced that there is a God

There are just as many (more actually) who believe in a different God than you do, and there are also many who believe in no God at all. Lots of people used to think the Earth was flat y'know.

5. We know God exists because he pursues us. He is constantly initiating and seeking for us to come to him

God has never spoken to or pursued me directly. I always hear about him when people talk about him, and when the Jehovah's witnesses show up t my door. God has never spoken to me face to face if you get my drift.

6. Unlike any other revelation of God, Jesus Christ is the clearest, most specific picture of God pursuing us

When Jesus shows up in the flesh and makes my order of Fish N' Chips feed a multitude, I'll believe with you. BTW theres a hungry multitude in Darfur and I bet they like fish.