That one item

I'm looking for that one item that will inspire the other features we put into the house. The one that will help make all the other decisions a little easier because I'll know the style and finish I'm looking for.

For example, I love this light fixture for the dining room. I love the warmth that the golden shade brings and the oil rubbed bronze finish. This is a terrible picture, but
imagine three of these pendants hanging over the kitchen island. Again, golden shade with oil- rubbed bronze finish.

Can I mix and match finishes? I really like the oil-rubbed bronze but not for the whole house and I've read that it's going out of fashion and that brass is coming back in. Eww brass, really?
My thought is to have brushed nickel be the main finish for the house on door knob's, kitchen hardware and bathroom fixtures but for a few pieces or maybe for a bathroom, I'd like to incorporate the oil-rubbed bronze finish in a few places.

This is also my dream vanity from Pottery Barn. I would never pay what they're asking for, but I'll print up a photo and bring it with me while shopping.