Pete,
I really like the idea of the trunk lip mount on the hood, and I think seeing that I'm only going to mount one antenna for now, that's going to be the winner. I have an external speaker mounted with velcro on the center of the dash, down by the defroster vents. The wire is run along the dash, down and around underneath. Another thought that I had was to mount the speaker up by the rear a/c, above and behind your head, and run the wire under the headliner.