Arguably the greatest and most influential Tex-Mex group ever, the Sir Douglas Quintet epitomized Texas' reputation as a fertile roots music melting pot and established the career of Tex-Mex cult legend Doug Sahm. The Quintet mixed country, blues, jazz, R&B, Mexican conjunto/norteño music, Cajun dances, British Invasion rock & roll, garage rock, and even psychedelia into a heady stew that could only have come from Texas. Although they went largely underappreciated during their existence (mostly in the '60s), their influence was far-reaching and continues to be felt in Texas (p...