IMO Vegas Sportsbooks are a boring place to watch football, and sports in general. All the TV's are small, no sound and it's pretty much just grumpy gambleholics pacing around mumbling to themselves about the money they just lost on race #12 at the track.
Now there are quite a few really cool sports bars in Vegas to watch the games.
Twin Peaks is right on the strip right by Planet Hollywood. Great food and booze (and wait staff).
Lagasse's Stadium inside the Palazzo is really cool, and also has good food and drinks.
The Heraea inside the Palms I hear is really cool. I haven't been there, but my buddy has and he loved it. A little more low key than these other sports bars, so if you just want a cool place to chill and watch without all the craziness, this is a good place.