and everyone agrees, the spurs are not the norm in the NBA...
You have apparently never watched the Spurs. Sure they have good players, but the system is what makes it work. No player on the Spurs are probably the top player in the league at their position, they just are very disciplined. All the NBA teams have talent, the difference is often the coaching.
As far as Marshall, I believe he is ours to lose. UK could be a problem, but I think Texas is a non starter. Much like Saban, he does not want boosters telling him how to run his team and UT is notorious for big donors interfering with their teams. UK is the premier job in America and I would not blame him if he took it, but I know the boosters there will give Cal whatever he asks for to stay. It may be he just wants a big raise. Coaches are very egotistical though, but it ceases to become about the money at some point. It becomes about their coaching legacy. Does he want to be known as one of the great coaches in NCAA history or does he want to be known as a coach who moves around every 5 years. The other factors may be when he has left every program, they have had NCAA issues. He may be just ahead of the NCAA posse.