And one like this one you posted:http://www.battenfeldtechnologies.com/caldwell/catalog.asp?product=magnum-rifle-gong
The top one from sportsmansguide is actually small in height. It might be about 8-9 inches tall but it will take what ever abuse your guns can dish. And the AR500 target.......FAGETABOUTIT!!!! you can't hurt it.
All good choices though