This is a tough one for me, but I actually might disagree with the 1st response and take a chance with team 2... The only reason I would consider that is because of Iguodala. I think his high value seasons are over.
Right now Carmelo is the best player involved, but honestly Batum isn't all that much of a downgrade. So if you take those two out, between Smith/Horford or Gasol/Iggy I'd probably take Smith/Horford.
But if I thought that Iguodala had even 2 more seasons of top 100 value left I'd take side 1 in a heartbeat.