I really like your idea, Jane.
Frankly, I'm piggybacking because eventually (not this year; too many other expenses going on) we're going to have to do some serious renovation work with our downstairs half bath.
But let's concentrate on Linkat
One thing I know -- buyers want to visualize themselves and their stuff in your house. If they can do that, that's half the battle. So, not too clutter-y and not too personalized can help to goose a sale. Dunno if a vessel sink would qualify for too personalized. I find them odd, but that's me.
Is this a bathroom that would be near a mud room or otherwise used for some heavy duty stuff, versus just for company? I'm just visualizing my father coming in with motor oil on his hands after working on the car. Does he wash up in this bathroom, or do you send him to another one? If he washes up in this one, then things that are somewhat delicate-looking (even if they aren't delicate for real) could detract from that usage.