Quietly and consistently, Diamond Rio has become country music's classiest outfit during the past decade, turning out one quality project after another.

Quietly and consistently, Diamond Rio has become country music's classiest outfit during the past decade, turning out one quality project after another. Completely is no exception, boasting stellar musicianship, soaring harmonies, and top-shelf material. The debut single, "Beautiful Mess," is a haunting, swirling gem; "Big 'Ol Fire" and "The Box" show how commercial country can be musically adventurous; and the loungey "Something Cool" is just that. A likeable take on aging, "Wrinkles" effectively blends piano and mandolin, while the title cut is a piano-based ballad that avoids sappiness only through its on-target performance, and "If You'd Like Some Lovin' " is pure country swing. Elsewhere, the ambitious instrumental showcase "Rural Philharmonic" is the intriguing marriage its title suggests, and the weeper "Make Sure You've Got It All" is as traditional as anything this band has ever laid down. This is how it's done.—RW