A good kicker can mean the difference between a win and a lose. Obviously, you will want to find the kicker that kicks the most field goals. But the difference between a great kicker last year and a average kicker isn't that great.
Last year, Nate Kaeding had the most Fantasy Football points with 146 while the average for a decent kicker was 120 points (this is relative because different league score FGs differently).
Your going to find that you can get a place kicker with a good matchup on most weeks. Good matchups for a kicker are matchups against either very week defenses or against strong team defenses that hold teams from scoring TDs.
In any event, you should never select a kicker before the 15th or 16th round of a typical 18 round fantasy football draft.
Dynamic offenses like NO are likely to move the ball down the field often. Even when they don't score a touchdown, they are often in the position for an easy field goal.
Of course, accuracy counts for a great deal. That's why I have Mason Crosby so far down the list. Great offense, but he missed 9 FGs last year or about a 75% accuracy.
Every year, there is a team that will have the capability of moving the football but also seem to fizzle out near the goal line. I have Robbie Gould ranked that high for this very reason. I think Chicago will be able to move the ball, but Matt Forte and Jay Cutler will struggle to convert the TDs in games this year.