A while back, there was a thread for JVL Jewelry that had a coupon code for free tungsten rings, all you pay is shipping. I ended up ordering my FI's ring from there and he loves it. It is pretty heavy and has the lifetime warranty, which was important to us both. They were accomodating of our odd request for engraving (think green lantern symbols).
They emailed me a coupon code for free rings again, all you pay is $25 shipping for each. Let me know if you are interested in the coupon code and I'll send it to you.