I don't see the attraction for Ronaldo to go to Juve - they are nailed on for the title regardless, and they probably have a 90% chance of getting to the 1/4 of the CL every year at the very least (without him)
Given all of the dozens of records he holds, there's probably not many big things left for him to achieve at Madrid other than to just keep pushing the bar that bit further each year.
At somewhere like Juve he has the possibility of becoming only the second player ever to win the champions league with 3 different clubs.
Hard to see Juve getting value for money at this stage of his career though. But who'd have thought that Real would get 9 (?) seasons out of him and still sell him for a profit!