The marble looks fine and should work nicely with the tile.

You could use a bath bar over each sink. This one is 20", about right for a double sink vanity. If you can mount them on the mirror, it will give you some light bounce.

http://www.build.com/kovacs-gk-p5042-bathroom-light/s528811

Side sconces give the best light for close-up tasks. Some Gardenwebbers have been able to squeeze in a sconce when sinks are close to the wall by using a narrow mirror over each sink. I think the best look for that is a narrow sconce on each end of the alcove with a matching double sconce in the center to fill the gap created by the drawers base. Double sconces have a single base with two shades.

If you do a full-length mirror, I'd use a narrow one about 30-32" tall as it's a little more contemporary than the full alcove look. With this look, you might put a three-light over each sink. I would not use clear glass as the lighting is harsh and they show every speck of dust and lint. A nightmare in a bathroom.

Muirfield Townes · More Info

Do you have additional ceiling lighting besides the chandelier?

I have that light over each mirror and it works great.