Portuguese Presidencial Elections

On the next 22nd of January, we'll have Presidencial Elections on Portugal. Being a nonpartisan, I'm really tending to vote on Manuela Magno or Botelho Ribeiro. Until now, this are the only pre-candidats that I feel confortable about, but I haven't read enough to get a good oppinion about any of the two, nor to choose one of them. Oh, and both still lack all the signatures needed to present themselves as candidats.