Seems like a unanimous vote for the alma bb. I have 3 alma bbs so you know my choice here. I went in to take a look at the croisette. It's more casual I think. Take a look at the epi bbs, they're so classy and understated and cute too. as for summer colors, you can take a look at the hot pink or blueberry. or poppy in epi or vernis is beautiful too!
My vote goes to the Croisette. I just got one a few weeks ago and I've been carrying it every day. I can't seem to switch out of it because it's so functional and great for the spring/summer. It goes well with most of my outfits (I usually dress very casually). Good luck with your decision!!