It's hard to know exactly what was going through saxophonist Bryan Murray's head when he first conceived of Bryan And The Haggards, an avant-garde jazz ensemble dedicated to playing instrumental covers of tunes by Merle Haggard. Haggard is, of course, the author of such C&W classics as "Okie from Muskogee," "Fightin' Side of Me," "Mama Tried," and other blasts of Bakersfield baroque. Regardless, the Haggards' first two albums were well-received, making Wire's Top Ten list and being lauded in pla…