I'd give the nod to Wade, simply because he's young and new to the game. It's one thing to be a great player during the regular season, and another to bounce back from a bad game against one of the better defensive teams and come up with such a scintillating performance.
Nash and the rest of the Suns really have their backs against the wall. I thought they were the better team when the series started, but the Spurs experience is helping them at the end of the games. I was very impressed with the Suns at the end of the second game, but they were clearly outclassed by the Spurs. They must win the next game, or they're done and will need to win 2 in a row against the Spurs to get back into the series. D'antoni has a lot of work to do to figure out how to get control of this series.