I dont think that there would be chemestry problems no matter who winds up in SA. Winners just dont have "chemestry problems". Players complain when teams are loosing, because they feel they could make the difference, but when you are winning, everyone just enjoys it for the most part. BTW I call the whole Shaq-Kobe fiasco a year or two ago Drama, not chestry problems.
I think the only way KG will leave Minny is with a sign and trade. He wouldnt completely screw over the team, because he does like it there, he just isnt sure if he could win. If he does walk, I see him doin what Grant Hill did when he left Detroit.
I think they will make a serious run for O'neal. That frontcourt would be impressive, actually unstoppable. If that doesnt pan out, I think they will be able to land multiple FAs, like a B. Miller and Lamar Odom? Maybe Magette? It doesnt really matter, because they are in the finals right now, and they can add another max FA. Greg Poppovich is the smartest/luckyest GM in the league right now.