This is the complete song, with a more "natural" reverb for the vocal.  I recorded the demo in F, but when I went to rerecord the song, I tried two new options:  Lower the key to A like Elvis' "Blue Suede Shoes," or slightly lower to Eb like "Jailhouse Rock."  The key of A didn't work.  I liked how my horrible, horrible Elvis-Meatloaf impression sounded in Eb, so I was going to rerecord all the other instruments in Eb.  Then I listened to the F demo again, and I really liked how the guitar sounded in F, so I just bumped up the Eb vocal to F, and that was that.

In other words, producing music is complicated and satisfying.