I would get the speedy my first bag was a mono 25 & I still love it. It is a classic bag great for all ages and fits loads. If you want something a little different go for the damier and you won't have to worry about rain with the damier.
Plus in the UK not everyone has a speedy not a real one at least
I like the Damier Speedy 25! I have one and it is a great bag - wonderful in rain and snow too and you won't see it everywhere.