I have a Hamilton (large purple saffiano) and a Selma (large black saffiano).
The Hamilton, is very nice and very very popular. I see them all the time. I spent a few years on the fence about the bag (liked the shape, wanted more structure)
I saw the Selma and it was love at first site. I am sure it is soon to be all over the place as well.
I like the Selma more. It is a bit more understated than the Hamilton, and looks very high end.
I use my Hamilton as my weekend bag or the super carryall, as I can fit in my macbook and a bunch of other stuff.
If you want everyone to know you have an MK bag, try a Hamilton or Grayson.
If you want to feel undercover luxurious, get a collection bag.