THEY’RE A BIG BAND. Not Count Basie big. More like big heart and big ideas. Big emotion and big gestures. Big-time intensity and, most importantly, a big-ass sound. A big mixture of rock and soul. Big ambition, too. Progression, what with its tendency to offer no guaranteed returns, is rare in today’s world. Rarity makes paying witness to an artistic arc spanning several albums during which a band is allowed to grow into its ambitions a real treat.