This is a pull out, rather than specifically a pull down, but this is the one I picked out....It has great functionality and appearance:

It's a Metris, from Hansgrohe

Kohler Artifacts…four way sprayer, magnetic lock head, ergonomic, transitional style, great customer service, lifetime warranty, and gorgeous. Ours is 6.5 years old. Kohler Artifacts.

The second pic has something i couldn’t live without… instant hot water!….from the little spout….so great for a quick cup of tea…and invaluable for a quick soak of dishes with cooked-on food that will not come off in the dishwasher

Another feature to look for one that has a “wider spray” head ….that also will spray a solid stream

I have a Hansgrohe and American Standard in my kitchen. One was cheap. They are both excellent. The AS might be better quality.

(Also love my instant hot dispenser...)

I’m going to throw in to look for a spot-resistant finish. I’ve been so happy with our three Kraus faucets.

My faucets are regular chrome. Not spot issues (it'll depend on your water of course). I have chrome Grohe fixtures in a bathroom and they spot badly. Maybe it's a maintenance issue. Kids!!

I've had a Brizo Artesso going on 4 years and have been very happy with it.