Diamonds, Engagement Rings and Fine Jewelry at Blue Nile
I'm recently married and shopped around for wedding diamond wedding rings. This site has beautifiul diamonds and allows you to find one that fits your parameters: size, cut, color, clarity and price. We were able to get a platnum set with a larger and higher-quality diamond here for about 30% less than what was in the jewelry stores. They also do not charge shipping or sales tax if you are outside of Washington State or if the shipment goes to another state.
Bluenile has beautiful engagement rings and an easy to use build your own ring program, right on the website.