I think you should get the light fixtures. You can mix metals now. But I would be cautious about polished finishes with all the brushed finishes.

So as long as i stick to brushed nickel I should be ok? it wouldnt look weird?

Mixing metals is in style. Check out jewelry as well as room ideas to see if you like it

By hardware do you mean pulls and knobs for cabinets? Or plumbing fixtures? In any case, you can change out cabinet pulls and knobs for brushed nickel which would look better in a white kitchen generally speaking. However, aged brass is also an idea to explore! If you have white cabinetry you could do pendants something like these.

This is a new twist with brushed nickel and chrome, and white globe.

You would need to make sure you get the extra rods so you can hang this over your island at the proper level. Should hang about 32" over top of counter top, but that is a guideline.

This is one of my favorites for white kitchens and this look is really hot right now.

the aged brass white and black can go great in a white kitchen. A little pricey right now because they have become quite popular, but makes a statement for sure. Just depends on what style you are going for.

This is interesting too and would look great in a white kitchen.

This is good example of new aged gold pendants and hardware on white cabinets.

Globe pendants in white kitchen with stainless appliances.

Yes, by hardware I mean the knobs and pull, etc... I am debating if I need to match the faucet to the cabinet hardware or if I did a brushed nickel if that would allow me to then incorporate nickel light fixtures too....?

ORB cabinet hardware will be fine to mix with brushed nickel light fixtures. You'll want a brushed nickel faucet also.

I'm actually doing the opposite in my white kitchen...brushed nickel cabinet hardware & sink faucet but ORB light fixtures. I'm just not drawn to most brushed nickel light fixtures.

That's actually what I would prefer, Lisa G... I think the oil rubbed bronze is too dark against the white cabinets PLUS the dark lighting fixtures. I would've preferred the ORB lighting and nickel hardware, but it's already been installed...

You do not have to match pulls and knobs to faucet finish. However, if you want really clean look, brushed nickel hardware (pulls and knobs) and brushed nickel faucet, especially if sink is in an island where faucet is quite prominent, that combo works really well, then you can do what you want on the pendants.

You can easily change out the cabinet hardware after you move in for a few hundred dollars. Our cabinets came without hardware and we're getting ready to order ours. We have 49 doors/drawers and it's only going to cost $200. We're going with Amerock Westerly pulls on everything.