Have you read the Indigo arc yet? I ask because that involved a change to Hal's ring, and I'd be glad to put that sort of thing in spoiler code if you'd prefer. I'm just not entirely sure it would be considered such or not.
Well, the spoiler warning's in the thread title. One needs to read with caution.
Hal didn't get a new ring IIRC, rather the power dynamic between the master ring and its construct was transferred--which is why Simon has a ring with a personality disorder.