Bigger sink, or, bigger counter?

My parents have a little powder room in the front hall that is absolutely stunning. What I simply love about this room is the sink and the gorgeous faucet. Now, since we're considering our bathroom reno, I'm debating whether this sink from Kohler is maybe what we should do. Afterall, we don't need a HUGE sink and this would allow more counter space for putting glasses, electric tooth brushes et. all. The debate is - bigger sink, or, bigger counter space? I mean, do you really need a BIG sink in a washroom?

Ps., My poor parents regularily see me snapping photos of what they have done in their house - I look like a spy. When in fact, I'm trying to replicate what they have done. :)