My personal choice would be for us to keep Rafa, I have faith that the man will bring us no.19
If he does go then my choices are as follows, based on whether we have money available or not.
if we have money ,then Mourinho must be the man purely based on his record in the EPL.
If we have no money available then I'd say take a gamble give Roberto Di Mateo a go, Why? Because WBA are second in the Championship after scoring the most goals (39) and having the second best defense in the league so far. Ther goal difference is the best in the league with 24, which is 5 better than 1st placed Newcastle and 12 better than the next best, Cardiff (laying 8th)
He must be doing something right and playing attacking football while doing it.