I haven't read many front-to-back, but I liked Gojira tai Gamera and the one on Planet X with King Ghidorah vs. all those space monsters. I should start writing some KWCs. Maybe a Mothra vs. Mogeura. Boy, I've taken a bunch of heat in that thread. Apparently they just don't appreciate the goodwill of everyone's favorite moth.
But as Varan once said, "blarhl!"