Call Of Duty 4/ Kane & Lynch/ Beowulf ???

which one shouldI choose???

- Call Of Duty 4: I like this game so much, but somebody said this game just take about 5-6h from begining to the ends??? It's too short, so that's why I ask you about this game, should i buy it???

- Beowulf: too many shoot-game in this year, so play a beat them up game is not too bad, but GS scrored it 5.5 Mediorce, so I'm really confusing about this.

- Kane & Lynch: I like the gameplay of this game, we can play as Kane or Lynch, and the story is really good...

So which one should I choose??? who have played it can give me an advise???

CoD4 all the way i've played them all, and Beowulf wasn't exactly what i expected, and Kane and Lynch was way to short for me, i didn't try the multiplayer though, but didn't seem that much fun.

I'd go with CoD4, or Kane/Lynch if you rather prefer that kind of game.