I know you already purchased the CG, but I would have said the NL MAM. I absolutely looooove mine and the leather is amazing. The bag has just the right amount of color and is a deep dark rich blue (it actually seemed to get darker and richer the more I used it; I used a stain/water resistant protector so maybe that deepened the color a bit).
I get so many compliments!
IMO, the MAB is significantly bigger than the MAM. Before I got my first MA bag (both sizes sight unseen, only looking at the internet measurements), I felt like "oh the size measurements are not that much bigger..." then when I got it I couldn't believe how big it was.
I hope you love it and the size works for you!