Rafa could represent a return to the good old days where Inter spent more money than anyone else, bought the best players in the world and still came second.
Then again that might just be wishful thinking
The initial reports are that it will be a 2 year contract. This year I don't expect Inter to buy much. They bought 6 starters last summer and the team won everything. Even if Benitez wants to bring lots of players, Moratti won't let him.
Next summer though, they will probably buy more. It depends on how Benitez does this season and if Moratti will trust him enough to give him lots of money for transfers, but in any case, Inter will need to buy more players.
If you look at the team that won the CL, you'll see that in 2011/2012 apart from Motta (who'll be 29), Pandev (28) and Sneijder (27) all the others will be in their 30's. Even the bench players like Stankovic, Cordoba, Materazzi, Chivu (who are already in their 30's) will need replacing.