By Jacob Camargo November 09, 2009UFC middleweight top contender Nate Marquardt will not be waiting around to see how Dan Henderson's contract situation plays out, as the Jackson's Submission Fighting product will move forward and take on fellow contender Chael Sonnen at UFC 110 on Feb. 21, 2010 at the Acer Arena in Sydney, Australia. The pair are awaiting bout agreements and will be added shortly to the UFC's debut in the "land down under" according to a...