If you look under the jewelry pieces forum, you'll also find a thread with yellow gold. It shows all the different styles that take advantage of its rich yellow color.
Do you normally prefer YG or WG for your other jewelry?
Both are equally pretty. I usually prefer WG so that's what I choose for my most important pieces.
I agree Google yellow gold pricescope you'll get more than enough examples.
I LOVE colored gold. Its interesting. More unique. Less chance your allergic, and doesn't need replating. Plus you can get away with a lower diamond color (and get a bigger size!)