I'm pretty sure it's *not* Texas Stadium, as that stadium has artificial turf and has not been used for soccer, it's the home of the Dallas Cowboys, an "American Football" team. Most of the roof is covered, with an opening in the top directly over the football field. The Cotton Bowl in Dallas hosted games during the 1994 World Cup, but that is a different stadium, and is seldom used for soccer anymore since FC Dallas built a small, soccer-specific stadium.
I agree with International, that "Amerigo Atlantis" is "El Monumental", despite the fact that some of the architectural details are wrong. The main clues that convince me are:
(1) The placing of the lights close to the rim of the stadium. That's very distinctive, and I haven't seen it in any other stadiums besides "El Monumental":
http://en.wikipedia.org/wiki/Estadio_Monumental_Antonio_Vespucio_Liberti
(2) The fictional name of the stadium, "Amerigo Atlantis". The stadium is formally named after the late director, Antonio Vespucio Liberti. I believe the late director's middle name refers to this person:
http://en.wikipedia.org/wiki/Amerigo_Vespucci
So, although not all the details are exact, they're close enough that I've labeled it "El Monumental", despite some option files labeling it "Estadio Nacional" (which, of course, could be another clue, as "El Monumental" is often used as the home stadium for the Argentina national team). And since Boca and River have always been the two Argentinian teams included in the game, it prevents me from having River play their home matches at "La Bombonera".
Speaking of which, in the game, you can't really see the distinctive stand that gives "La Bombonera" its name! But everyone pretty much agrees on which stadium it is, even without the "chocolate box".
P.S. When I play Argentina vs. Brazil in "Amerigo Atlantis" in Winning Eleven 9, there are special stadium effects I haven't seen at other stadiums (when setting the time of day to "night")...
