Define the boundaries of what constitutes a "good" reason. Since it is your term (you use it multiple times, but set no parameters as to what constitutes a "good" reason) the burden is upon you to define what you mean. Qliveur is quite right, especially given the following:
If you have a good reason to believe in such a god, please post it here. I will provide the rational response to the supernatural.
While I might be able to read between the lines (I'll presume you wish empirical evidence) of your statements, it would be most helpful to your victims, er I mean respondents, to know exactly what you
want. I've gotta admit, that while people like you and achilles make claims toward agnosticism, your incessant and often condescending reduction of other people's beliefs to superstitions indicate you are not only atheists, but most likely even antitheistic. That's all nice and fine, but the disingenuity rings hollow after a time.