Hi Mike,
While I've never had the "Extra Old", Mount Gay rum is great stuff. It's from Barbados instead of the light crap from Puerto Rico.
You know the funny thing is that most of the natives in Puerto Rico DO NOT drink Bacardi even though the distillery is right there in San Juan. They drink another popular Puerto Rican rum (the name escapes me at the moment) which I have to agree is better than Bacardi.
I think you'll like the Mount Gay.