I think Sher Bahadur Dewba will be a better choice because he has a lot of experience of every kind. He has already been PM for 3 times, have been kicked, bashed and even only PM to be decorated with the Medal of  Incompetent in the history of Nepal by His Majesty himself. He has experience of becoming PM in every circumstance. He was the one to take the bold decision of declaring emergency in Nepal, postponing election twice and still stand up again to take the responsibility of PM again. I guess there is no better choice than Dewba to be PM in Nepal.