i think the majority of us here would prefer Diego and agree he is the slightly better player.
However, with Van der Vaart having a clause in his contract which can see him leave for 700,000 thousand in 2009 we could get him on the cheap this summer.
I would prefer Diego but if he is going to be £15m+ euros more than Van der Vaart then i think we should just go for Rafael. remember we still dont have a huge amount of money and need to invest in our defence too.