Martins is a player I want us to seriously consider. Top player, slightly wasteful in front of goal but always gets into goalscoring positions and can make his own chances. Would provide a bit of pace especially when Torres is out. He would score a lot of goals in a top 4 team imo and wouldn't break the bank - in fact doesn't he have a release clause?
Realistically though I don't think Benitez will have money to spend in January. If he does, it should be spent on a goalscorer. We will always create chances with the midfield we have, but with Torres struggling for fitness and Keane struggling for form, we need someone else who can stick the ball in the net.