At the 10 year mark it's possible that brushed nickel will be horribly dated like brass (I don't mind dated finishes but some folks sure do). Chrome really is durable. Unbeatably so. Look at old Buicks! I do have some 80 year old nickel faucets (hot and cold) that look a bit weathered but the nickel is still good. Of course, it started off shiny and is probably not what they are currently using for "nickel". I think for nickel, you need to compare specific manufacturers--the colors of the finish vary and the composition must as well. I had brushed nickel hardware (door handles and cabinet pulls) installed my the PO in my last house and after less than 5 years, the more used ones were worn smooth. I didn't mind, but you could sure see which cabinet had the good towels and which one had the cleaning supplies (insert blushing face here). For durability (and for not being in fashion enough to go out of fashion), I think chrome is the way to go unless you dislike it.

We were initially thinking some sort of white-grey porcelain tile but couldn't find any that had a little texture in them. Most of the tile we saw was more beige than white. We don't like the tile shown in the photo - too small with too many grout lines that could be hard to clean. We want a little texture in the tiles so it is not slippery but not so much that it is hard to clean Thanks

I think they'll look fine. It's a different finish, but still silvery.

I'd go with chrome, since you already have the towel holder in chrome, in addition to your plumbing fixtures. I have mostly chrome in my bathroom (plumbing fixtures, light, towel rings, etc.), with satin nickel door knob and floor register. My vanity knobs are glass. I fretted and fussed about too matchy vs. unmatched. In the end, it all looks good together. It's just nothing to worry about.