I'd say go for all of The Perfect Element, considering it's one of their most popular cds, and it's better to listen to as a whole, and not individually. But uh, let's see... Song of the Innocent, Second Love, This Heart of Mine, Water, Inside, Beyond the Mirror, Falling, Ending Theme, Undertow, Dryad of the Woods, Waking Every God, Enter Rain, Scarsick, and also the 12:5 version of Oblivion Ocean