Just list who you think is the top 3 players at each position. Here's what i think
C 1. Amare Stoudemire 2. Dwight Howard 3. Yao Ming PF 1. Kevin Garnett 2. Shawn Marion 3. Tim Duncan SF 1. Lebron James 2. Carmelo Anthony 3. Tracy Mcgrady SG 1. Kobe Bryant 2. Dwyane Wade 3. Ray Allen PG 1. Steve Nash 2. Gilbert Arenas 3. Jason Kidd
I can take Nash either way, but I like the fact that Kidd can contribute a triple-double to his game. Remember also that these two work under two different systems. With different players suited for their respective teams.
That being said, I think Kidd can go to the Suns and transition easier whereas Nash would find it more difficult to excel with the different group on the Nets.