The only rings I've ever liked are nipple rings, The Lord of the Rings, and Ringo Starr. I love these silver Lego rings, though. You can customize them putting any brick you want on top.
As you can see in the gallery, you can use any Lego brick or piece you want to change their appearance. They come in three different models, with one ($140), two ($151) and four studs ($165). Ah, if I only knew when I asked the two ex-wives to marry me. [Edition Mathea via Make]