This is a tough one....because I have a feeling on June 1 those Kristins are going to hit the outlet. I am not keen on the fabric the sophia is made of....too prone to having issues/stains. Out of the two Kristins I vote peony....it is THE color of the season it seems
I had read on here that the Peony (Coral) Kristins have been deleted. I'm not sure if that's all styles in that color, but I would wait on that one to see if it hits the outlets.
Also, the shimmer Sophia is made of the same material as the Poppy shimmer stuff, so if you search on here for the shimmer Sophia, there are a couple stories of SA's actually steering people away from them just because the material is so delicate and hard to clean. The bag is absolutely gorgeous and I love the color (and I love all things sparkly and shimmery!), but I would be so afraid of getting it dirty! All three of your choices are beautiful though!
ETA: Here is the link to a recent thread discussing the Shimmer Sophia.