TORONTO - Audio entertainment company Sirius Canada has surpassed the one million paying customers mark in Canada, the company announced Monday."Exceeding one million subscribers is our most significant milestone to-date and we're proud to be the fastest growing audio entertainment company in Canada," said president and CEO Mark Redmond, in the announcement. "Despite difficult economic conditions in 2009 and the slowdown in the automotive and retail industries, Sirius' subscriber growth has continued to be strong and has exceeded our expectations. Reaching one million subscribers in such a short time demonstrates the strength of Sirius' exclusive content, signal coverage and brand awareness."Sirius...