Well I've played both CT and I find that the speed of the multiplayer is much faster in MW3 than BF3 but also the maps are smaller and there's no vehicules.
It should ship tonight and be here Wen according to the estimate probably still faster then I could make my first one. Especially it being liquid cooled, also would like them to not rush building it as that is how mistakes happen. Anyway really excited since my wife's has already arrived. She is now playing better in TF2 and her Michael now works.