Sirius XM Radio (SIRI) said Wednesday it expects 2013 sales to reach $3.7 billion, lower than what Wall Street had been modeling, and shares dipped a fraction. Analysts had been expecting 2013 sales of $3.8 billion, according to Thomson Reuters. New York-based Sirius also says it expects to "meet or exceed all of its 2012 financial guidance." Sirius also on Wednesday said it closed 2012 with 23.9 million subscribers, up a net 2 million from the