The debate continues on the merger of XM (XMSR ) and Sirius (SIRI ) Satellite Radio as the case again comes before the Senate Committee on Commerce for round four since its original proposition in February. Opponents argue that the merger will create a monopoly, leaving a sole provider for satellite service to consumers. This, they argue, will lead to increased prices and decreased content. Advocates argue that the merger is necessary in order to compete against other technologies, including terrestrial radio, MP3 players, CD/DVD etc. The inference is that the battle between the two small companies for the limited audience is splitting the market and preventing its advance against the other technologies.