Heh, well you can't go wrong with the Mojo 60. Make sure you order the MOASS version (still just as stable, but really adds to the performance of the plane) If you don't own a BIG SUV / truck, get the removable wing option...I have a Saturn SUV and it BARELY fits.
IF this is going to be your "Beater" ...you might want to go with the tower muffler and save the good stuff for your next one