It would have to be one of the two in Vegas. Then Italy if location and playing is not an issue. In Vegas you see, there are people from arround the globe playing different styles that you may have never seen before. I played Germans, to Costa Ricans last year. It is also in BIGGER THAN LIFE LAS VEGAS. If you have never been to Vegas then it's really a no-brainer.
But be advised the conditions are extremly tuff. The balls start out so so slow while the rods are lightining fast. Then there is the lighting, which some would say is non-existant. The tables are on this thick-ass carpet and unlevel, and there is allways the chance of a manufacturing flaw disrupting your plans. Play starts early and if you keep winning, last well into the night. The Vegas Twins are the "Best" foosball tournaments in the United States, but Mary Moore tournaments are a Very Very close second. With Mary running Texas, and Kentucky State tournaments allong with a National Championship in Alanta you cant go wrong if you choose one of hers to attend.