When listening to Omaha singer-songwriter Matt Cox’s latest disc, “My Last Dollar,” one could envision a delta blues musician, a road-worn folk singer, a Tom Waits eclectic, a Dylan or the Dead Disciple, or an old soul junkie bringing those influences to new life. Cox is a unique songwriter in town with a voice and soul to his music that is well beyond his 28 years. “My Last Dollar” is a record as good as anything that current national artists of a similar style Ray Lamontagne or Amos Lee have done. This is one of those albums that roots songwriter fans scour music blogs and MySpace sites looking for on a Sunday morning with a cup coffee. Cox has recently added an arsenal of musicians to his stage show including such well-known and respected players as Benn Zinn, Seth Ondracek, Matt Arbeiter and Nick Semrad. These additions make him and his band one of the potential breakouts on the live stages this year. Matt Cox and his band will be celebrating the release of “My Last Dollar” on Friday, March 27 at the Wait