Your Saints will be playing the Falcons and it should be a very good game (sorry, but I am a Falcons fan so I'm hoping you will be disappointed).
The ESPN Club at the Boardwalk is a good place to watch football but realize that it can get crowded. The game starts at 8:30 and I'd be at the restaurant at least by 6:30 to get a seat. No one minds if you have dinner and then just sit for the rest of the night to watch the game. Just tip your server accordingly as he/she will not be able to turn over tables.
The food is decent and the menu is varied. Prices aren't that bad either. More than likely, the game will be on the big screen so you should be able to see it from just about anywhere in the restaurant.