Suns. I pick them to win the series as well.
I was very impressed with Nash and his ability to penetrate into the lane. With the players around him, there are too many options for the other team to cover. Even without Joe Johnson, the Suns have too much firepower for the Spurs to stay with them in a series.
And, while I'm at it, I'll go on record picking the Heat over the Pistons. This depends on Shaq being healthy, because with Wallace, Wallace and Prince the Heat put a lot of presure on the boards. But this is where Shaq proves once again his dominance in the league. The key for the Pistons is to control the boards. They will not be able to do this against a healthy Shaq. In addtion, Wade is too much for anyone on the Pistons to handle.