Speedy is a must have in every wardrobe. It a timeless classic bag. It is not trendy and will never go out of style. You will carry it for years to come.
im in the same situation as you.... but in general, i think the speedy might be better for all uses ( casual and dressy ) while NF is more on the casual side... but go with what ur heart desires
Both... okay, not both. So, I recommend keeping the Speedy now because it's classic and you've wanted it for a long time and getting the Damier Neverfull sometime in the future.