Bleu Celeste is a nice pop of color. It gets my vote. Good luck deciding!
I Épi. Not a fan of Damier here I think Damier is very boring.
I've also never been a fan of the Damier. It reminds me of men's accessories. Now, Epi, however, has always been my fave, so it gets my vote. Also, for the pop of colour.
To me it depends on your other slg's and which bags you are buying it for. I like my slg's to match and/or coordinate with one another. I like both of these a lot.