You may remember when satellite radio stocks were in fashion. XM Satellite Radio (NASDAQ:XMSR) and Sirius Satellite Radio  (NASDAQ:SIRI) were thriving with huge subscriber gains and meaty programming acquisitions.

This was before retail sales started slipping, losses kept mounting, and WorldSpace (NASDAQ:WRSP) went public.

Sirius is growing more quickly than XM. Its merger with XM -- if approved -- will no doubt help. However, with free Internet stations, HD radio, and adapters to allow iPod and portable players by the likes of SanDisk (NASDAQ:SNDK), Sony (NYSE:SNE), and Creative (NASDAQ:CREAF) to play in cars, it will be an uphill battle.

So is Sirius a value here, or is it still overvalued? Not all Fools agree. Anders Bylund is our bull this week. Chuck Saletta is bearish on the satellite radio provider. Where do you stand? That's what this duel is all about.

Duel on!

Rick Munarriz does not own shares in any of the companies in this story. The Fool has a disclosure policy.