Let's see, you are on the road, your defense had held the opponent to 100 yards in the half, you have been putting every kickoff in the endzone, and there was 1:30 left (depending on when we scored).

The question to me is if you stop them on defense, how much time will be left and how far would you have to go versus converting a 2 yard play? If you fail, you can still get the ball back and try and kick a field goal. If you convert, and your defense shuts them down you win. If you kick and tie it, you may have to stop them twice, and drive down field and score (assuming you lose the toss).

I think the big deciding factor is if you put them down by one point, they are in 4 down mode. If you tie it, and they fail on 3rd down, they will most likely kick (with some exceptions of down and distance).

So, I say tie it, and rely on your defense and Ed Reed's return ability.