I vote for the Propel Zero. I am trying to drink less Coke Cherry Zero because of the aspartame in it (which may be contributing to my blurry vision, I discovered recently), and I've started with PZ. I know it comes in several flavors including Lemon, Orange (and/or Mandarin Orange), Grape, Kiwi Strawberry, Berry, Pomegranate-(Combo, maybe Blueberry is the additional flavor, not sure), Black Cherry, and I'm probably forgetting a flavor or two.

Good luck with your switch!