Last year I pitched an idea to my dance partner for a Waltz routine. Life got in the way though and we were never able to do it, which is something we'd like to fix this year.

Concept: Myself (leader) and her (follower) in opposing dresses (myself in black and her in white) in a "power struggle" (good vs evil type of thing). The song would start with one of us leading and then the leader would shift 2 to 3 times throughout the song before a dramatic finish.

We need a good song for this, though. The tempo should be slow to moderate in order to accommodate whatever choreography we decide to throw in. Length should be 2-3:30 minutes with changes in dynamics.

Any ideas for good Waltz songs that fit this description?