I might go Inca vs R&F and Vanilla Civs, but I'm actually tempted to go Vanilla with a rework like England, Russia, China or some other, and just play for the mechanics at first. I did the same with R&F. The music is most important to me, and I will follow each game I finish by playing a game with a new Civ, like Inca, against all existing ones. Then next game I will pick a new Civ, add vanilla and R&F civs, plus the one (for example Inca) that I just played with. This way I get to feel their styles as a player and as AI, and I get to hear their music enough.