Marcus King, just 23-years old, has rightfully inherited Greg Allman's baton as the new "voice" of southern rock. From his soulful R&B/blues vocals -- a little Amos Lee's vibe -- and blistering guitar fretwork, he is a major talent worth following. His new album El Dorado is a wonderfully old school affair produced by Dan Auerbach of The Black Keys. This heartfelt ballad could easily have been on any number of Allman Brothers albums. Check out his band live, too. They bring the goods.