The logical conclusion of Atheism obviously is Nihilism and Nihilism says we are nothing but an illusion. So the ultimate choice is between God or nothing, there's no middle way in this matter.
This might not be true.
To some extent, the monotheism or God concept of Judaism was likely an ancient form of atheism, and to some extent it still is.
According to Jewish tradition, Abraham's very first revelation from God was that there were no gods like the ones sold by his father Terah in his shop. His father provided various idol gods to people of various beliefs. The narrative states that after contemplating on the matter for some time, young Abraham reasoned that the world and its beauty and all that people on it had to be caused by something far greater than the god images people purchased from his father--even greater than the concepts behind the idols which filled his father's shop. The world was too wonderful to be the product of such things, Abraham understood. There had to be a greater Cause than the deities that were represented in image form on a shop's shelves or even those worshipped in nature (such as fire, water, clouds and wind).
This great Cause is in a sense not a deity at all, at least not a deity in the sense of human comprehension. While referred to as "God," the Ultimate Cause is remarkably greater than even this mortal designation. The interesting factor that God is worshipped with no image and that God's name is not pronounced makes God somewhat of an anti-God. I have often explained the Jewish understanding of God as the "un-God," much as the soda pop 7-Up was once sold as the "un-Cola."
At least from a Jewish perspective on monotheism and philosophy, atheism may not be a dead end road at all. Denying the God-concept which, as you point out, is often the one promoted by Fundamentalist Protestantism, may be quite efficacious.
The Catholic and Orthodox concept of God is virtually similar to the basic Jewish one, namely that for all we might explain about God all definitions fail and God remains mysterious. Even the reason for the advent of Jesus Christ in the world was, according to Christians, to make this mysterious God relatable and comprehensible. Colossians 1:15 describes him as "the image of the invisible God," even though as the story of Abraham from Jewish tradition points out, God is not an idol deity, God is not a God with an image.
On the other hand, you could also be right in saying that the ultimate end of atheism is nothing. But is such "nothing" incapable of being another type of revelation of God? That "nothing" is also what describes our God. One seeks an image to represent God, one leaves with nothing. One wants to hear the true pronunciation of the Name of God, one is told to say nothing. One wants to see the Great Cause of the universe? One can point their telescopes anywhere and everywhere they wish, and all that the human eye will see is nothing.
The anonymous work that inspired St. John of the Cross, The Cloud of Unknowing, suggests that the way to truly know God is to abandon any definitions and attributes one places upon God through the concepts they learn. The work suggests that the reason many of us argue about what God is has to do with our failure to surrender our own ego. Just as the Israelites fatefully created an image of a Golden Calf and declared it God, sometimes theists make up a similar mental image of dogmas and doctrines that define God for them. The work teaches us that in the end the only true way that one may begin to glimpse the nature of God is to let go of our own concepts of God, to enter this "cloud of unknowing." Only by embracing the "nothing" can one truly find Something.
Better to find a common ground in the convictions of our atheist sisters and brothers than to challenge their claims by arguing over...nothing.