I appreciate this thoughtful response, though it troubles me that the agnosticism you speak of seems to have lower standards of skepticism for claims the more arbitrarily they try to rewrite the laws of reality. What I mean by that is what I perceive as a misapprehension of the value of epistemology to sort sense from nonsense. Any claim which requires the invention of a separate “transcendental” reality where contradictory entities such as omnipotent, omniscient beings can exist should rightfully be subject to higher standards of incredulity, rather than the agnostic submission to the "unknowable". There is in the Socratic method a means of peeling back the mental obstruction that is so often infectious in theists arguments.
Epistemology tells us that knowledge divorced from the world of the senses and/or beyond the powers of cognition is impossible. While its true there may be kinks in our metaphysical armor (we aren't infallible, after all) it is perfectly demonstrable that those who make these claims aren't actually being perfectly truthful with themselves. As demonstrated by the behavior of theists who use the powers of their senses and cognition in order to advocate their inferiority. If the claim that there exists higher means of acquiring knowledge of reality were serious, than many theists who make this claim would volunteer for the Helen Keller treatment, going so far as to have their sense of taste, touch, sight, smell, and sound impaired along with a good old fashioned frontal lobotomy in order to demonstrate in a profound and unmistakable way just how seriously they take their claim of the superiority of faith and "higher" reality over the earthly and mundane.