In my (more than 20 years) experience, polished nickel does not have any greater tendency to stain than any other metal used in faucet fixtures, if the fixtures are a higher grade manufacture. In general it is better to stick to one metal finish as much as possible however, the range hood is a "WOW" factor and can be treated as such....a stand alone piece that has a different metal finish.

Btw, the link to the chandelier in your original post does work. If you want to add photos to your comment, follow these steps : -copy the link -start a new comment (or edit an old one) -choose Houzz Photo -choose Houzz url. Paste the link in. You want to be sure you have the complete link; if you do the picture will show in the bottom box. Or if you've saved the picture to an Ideabook you can skip the copy and paste and choose the photo from Ideabooks -click Insert I don't know if it's a Houzz glitch or slight user error but I'm seeing a lot of boxes with links in comments lately. The links don't always work but we can get to it by following the More Info tab. Hope this helps :)

The large stainless won’t produce much light. The teal glass fixture will distort the colors in the room. Return them both. The first of the two lights you are considering is best. It is visually unobtrusive, does not distort the colors in the room, and is a clean simple style that will stand the test of time. The small amount of brass will not clash with other metals in your room. Alternately, if you want to match your metals, here is a suggestion:

I’m not usually a fan of brass, but I think yours looks great. I don’t think you need to change the dining room fixture, it is far enough way and it coordinates with the polished nickel on the backs of your chairs.