Definitely buy a heavy duty one. For our Longhorns, we use the Applegate Steel (red horse type ones) which seem to last the longest. We have a few of the Tarter Gate (blue or green horse type) we use on calves and yearlings. The Applegate ones hold up a lot better with our mature cattle.
On the other hand, our mature bulls can lift up one of these 175# to 200# or so rings and move it as well as partially trash one out if he decides to do so.
Bottomline: Get one with at least 14 gage steel with a metal skirt on it. Stay away from the "mass merchandised" cheapy ones that are a lot lighter weight and not well constructed (IMO).
Expect to pay over $200 for a good sturdy hay ring, possibly up to $300 or more.
Note: About the only thing a mature bull (of any breed) can't hurt is a hay ring made out of 2" or 2-3/8" well pipe welded into a frame of your design...lol.
I've seen some of the "cheapy" hay rings made out of 1-3/8" chainlink fencing pipe...might be ok for some calves for a year or so...lol. IMO not worth loading up on your truck even if the store gave them to you!