Whilst the overwhelming majority of Argentina's top 30 players play professionaly in Europe, they should not be placed in to an expanded 6 nations.
(Now put aside all issues of financing Argetina's proposed [and much needed] ventures).
The only place for Argentina is in an expanded Tri-Nations. The Tri-Nations are in need of an overhaul and this will only happen with Argentina thrown in to the mix. This will not be possible until 2010 (three series from now) due to contracting right to News Limited, but when this time is up, the idea should be made a reality.
If Argentina were to be placed in a competition with the current 6 Nations teams, then it would provide minimal growth as a result of the competition, whereas if the Pumas were placed with the "super 3", it would give the Pumas a bench mark to ascend, albeit a lengthy ascent. This would be in the best interests of the team. Los Pumas need the strongest competition possible. Look at their potential.
I could keep going on about this, but its too late
Need sleep.