I have reverse and noir. Love them equally. If I had to pick just one I’d stick with noir. Strap is super comfortable especially when the bag is loaded up and it’s more subtle for those times you may want to be discreet. I also find it can be easily dressed up or down, better than a canvas Métis IMO.
Truly though. You can’t go wrong. I’m actually contemplating adding a mono one to my collection too. It’s the best bag.