Intersting thread and discussions - I think Prior is has become a better keeper than Dhoni and may probably be a better batsman.
But - and this is a biggy... (for me)
Dhoni is a brilliant captain and, I suspect, has far more between his ears than Prior and on that basis in my book would get picked above Prior in all forms of cricket.
Regardless, next summer when India tour England we will really see who is the master - a question for Jeet - Will Dravid even make it?
India seems to be rebuilding while the next 12 months could be a great period for English Cricket (or for those fed on a diet of 1990's English cricket we expect it to go horribly wrong - but are fed thanks to the little voice of hope and the fact that Andy Flower is a very special coach - even Duncan Fletcher is jealous of him, just read the bitterness in his guardian articles and the lack of Eng players in the ICC cricketer of the year nominations).
We will know more today when play gets underway. Pak are well on top and England will have to bowl with patience, control and luck to get back into the game. If England try too hard for wickets they will get carted.