Except win rings with the Spurs
Seriously, Paul would be a bad fit in the Spurs system. I don't think he can live with his stats going down so much. People don't seem to understand that a player's stats are directly affected by the style played by a team, and the surrounding cast (and in case of stats, for elite players, their stats are usually better with a bad surrounding cast).
I think Pop would bench a PG after the 3rd alley-oop, because there's no ball control, no ball movement, no running the clock...
Paul will go to NY, have crazy stats in d'Antoni's system, a good shot at MVP (like Nash), and no rings.