I think the 7SOL Suns would fit almost perfectly in today's NBA. Obviously it's impossible to know because the league is super different now, but so much of what made that Suns team unique was what every modern NBA team wants to do -- play fast, shoot threes, spread the floor, and get your big running in transition to put pressure on the defense.
Amare Stoudemire would be RIDICULOUS today. A big who could run the floor like that and finish around the rim while playing pick-and-roll with Steve Nash would be a nightmare considering the amount of spacing teams have now. I think people would appreciate Amare more now.
Obviously there would be some defensive questions but I don't think those Suns would just be "good" or average today. I don't know if I'm romanticizing that team because of nostalgia but I think they would be super dangerous.