Getting my XBox back today...Halo 3 or CoD4?

[dawade]

I had the red ring of death happen about a month ago and I'm just now getting my XBOX back.

Funds are kind of tight but I'm probably going to sell back a game or two and see if I can scrap up enough cash to get Halo 3 or Call of Duty 4.

I loved playing Halo 2 and I also liked playing Call of Duty on PC, albeit not much multiplayer experience except for the CoD2 that came with my 360.

So...which one should I buy?