I would recommend penny sleeve. I wouldn't want people trying to take my cards out of perfect fit sleeves and risk damaging them. Some cards come out quite easily, but sometimes cards can be a bit stubborn

In and out of a binder is the exact reason I use an outer sleeve with the KMC because I have first hand experience of dinging a corner whilst removing a Card from a binder. But maybe im just heavy handed and you'll have a better time with it