A poll for Alpha tv and highlighted by MacroPolis shows Syriza leading by 3.
Greek poll 30 12 2014a
As I’ve just mentioned in the comments, one of the risks is that the extreme parties like Golden Dawn gain a larger slice of the votes and become a big factor in coalition talks. I don’t know the lay of the land now but there was something like 30 parties with seats in 2012 including the wonderfully named Pirate Party of Greece.