Call of Duty 4 moments

I was a bit of a noob back then and i had taken the sniper rifle, don't know the map at all and i'm in plaine view ,therefor screwed. Here comes this one guy that (I guess didn't see me, so i line him up and shoot. All of a sudden i see +40 on my screen, I had accidentally ran through 4 enemies with the same shot.

Same game but recently, lined up 6 dudes with the Grenade launcher in one shot (where they having an orgie? i don't know but, they where all neatly waiting in the hall for my grenade to kill them), total accident, but you would have never heard me say it

Gears of War

My whole team was dead there was only me, and i suck at GOW, in all honesty i do, but they must have been over confident because i killed all of them, and not with a shotgun(which at that time i didn't know it was so powerful) with the lancers chainsaw, my team was cheering ,litterally! I on the otherhand almost pissed myself with pride (lol)

For This christmas I was thinking of buying myself a new system. Which one though? Many tell me XBOX for the games ,PS3 for the graphics.

So tell me, which one should I get? I was leaning torwards an XBOX but I need some real Opinions.

OH yes and please...no fanboy comments such as"Sony is better" give a few reasons.

Thanks in advance

Shadow of the Colossus beat the thing in less than 5 hours but it was the best five hour game I've played in my life........:P

Ange-Mort