Since you're deciding on two bags......... I would get the Galliera and NF. I have all 3 and they are all daily workhorse bags that will be stylish for a very long time.
Galliera... Amazing bag... Comfortable, glam and has the most perfect smooshiest leather which creates a beautiful shape! I think it will be around for a long time!
Get the Galliera, you will love it!! It's stylish, comfortable and will go with whatever you're wearing...whether you're running to the store in your sweats or having lunch with your girlfriends in your Louboutins. I don't see it going out of style any time soon, and you already have a Speedy, so I really think you'll enjoy the Galliera!