The most important thing in producing a cohesive design is to set up rules. In the scenario you describe you have a rule: installed things are stainless and lighting is bronze. That works. Plus you've let us know that the bronze picks up the tones in your cabinetry.

Sounds fine to me. If you're still questioning it, is there something else that bothers you about the fixture you like? Is it the right size and shape? Or was it just qualms because it doesn't "match". I was helping a guy buy linens once. I told him that this blue and that yellow went together. He said no. It was too much mixing. But then he bought a blue and yellow set from a designer, with more patterns in it and more tones, but they all had the same label so they "matched". Things don't have to match. They just have to go.

Hi Rita...(I'm a Rita, too:)

Looking forward to seeing your kitchen! I'm thinking that you can mix it up with dark bronze if you want, because it would compliment your "darkish bamboo"...

Is is possible for you to show us your kitchen now and the light fixture that you are considering??

That would really help...

KA:)(aka Rita)

Hi Rita,
I second Plllog, try to follow a rule. I have brushed nickel knobs, faucets, stainless sinks but went with oil rubbed bronze fixtures. The rule I followed is "as long as it relates to something else in the room, it can work". I think it worked well for me because my perimeter countertops are black. Also, I think it's more interesting to mix things up a bit.
Some people can mix finishes and colors right off the top of their head with no rules and it works. I'm not that bold and jumped at the chance to follow some sort of logic. Sounds to me like your fixtures will relate to your countertops. Go for it!

Rules are made to be broken :-) If you like the look of something get it - if you like how things look it doesn't matter what the kitchen fashion police think :-)

Rookie, I bet the ones who do it off the tops of their heads are following rules, even if they aren't articulating them. When I have to explain a design of mine after the fact, I can't just say "well, because it looked good". I can often find a rule that will explain it.

I forgot to answer Rita's second question: Yes, I have a mix. The ovens, cooktop trims and faucets in my kitchen are stainless. The hardware and hood are brass. It would look funny with one brass faucet and one stainless one, or the shafts on the knobs slivery color and the pulls brass. I could articulate the resulting rule in a number of different ways. The one I like best is that stainless is only in Middle Earth. That is, in the work area between the lowers and uppers. It could also be stainless for cooking and water and brass for everything else. It could be stainless for function and brass for decor. The rules aren't for limiting you, but for organizing your thoughts. Whichever mode of organization works for you, they'll guide you to choices that are most likely to work well together.