No, I do not think that this is a good idea. Both of them have long hands in the jar. Besides Nawaz Sharif seems to be diving into the Wahhabi theology during his exile in Saudi. Take a look at this
http://www.asianoutlook.com/nawaz.htm
And to Nawaz Sharif even though this was an exile but he seemed to be making the most of it by learning Arabic, and reciting holy Quran more often and spending a lot of time with his family and particularly his Father.
I put my money into Mushaffaraf for the time being, but he has to stop the Madrassa, introduce an education reform and go out for a real hunt of the fundamentalists.
Build the institutions and then introduce democracy. We should get something for the 20 % increase of the Pakistani budget.