Ingnorist sounds a little too much like ignorance for my taste! Once I got over the initial reluctance, I found that "atheist" grew on me. People at least have roughly some idea what it means, and it's fun to hear them say things like "No, you can't be! You're such a good/nice/etc. person!" I just think of the "a-" suffix as not meaning lack in the sense of a deficiency, but simply in the sense of being without.
By the way, what does Metta Zenda mean?