The warrants only become common if you are willing to pay the call price, which many traders will not be willing to do (investors might be more willing). My points were threefold: 1) the risk in owning the warrants is that the profit is capped unless one already plans to pay the call price at that time; 2) despite the reduced leverage the common might be the better play, unless 3) r59's postulation about what might happen to the common in an exercise scenario comes to fruition.
Regardless of how one plays CCME, it's a great co.