Jack,
Yes, you have to go ONCE, and then say you've been there done that.
Make sure to read the Road Trip through the South by Woodburner if you haven't.
Woodburner's TripFogo de Chao or Texas de Brazil are both all you can eat Argentinian (there's one in Memphis).
You guys just need to take a road trip next year, come to tulsa for the 85 team contest and we'll tell you which places to eat on the way.
As for the Texas places, be careful, a lot of the are serving "smoked beef" and when it says that, it's clod, not brisket.