Finished Rubicon. Very interesting book. The Hardcore History podcast Death Throes of the Empire drew heavily on it. I'm tempted to read Simon Baker's Ancient Rome now, but I'm also curious about the post Julius Ceaser Roman world as well.
I love Rubicorn, although my first introduction to Republican Rome was Colleen McCullough's Masters of Rome series. It's less good when I go back now, but still an amazing work.