2700k not worth it look at a i5 2500k since you are only playing cod4, if you want Hyperthreading (useless if you ask me) get the i7 2600k
ASUS GTX 570 over the gainward greater cooling solution, better support and brand, worth the extra $20
Get a z67 motherboard since you purchasing a PC now preferably ASUS or Gigabyte, they support PCI-E 3.0 (new AMD GPU's and NVIDIA Kepler when they are released support this) plus they support ivy bridge 22mm CPU's that come out around march/april this year, just a flash to your motherboard BIOS to get them to work. This gives you flexibility to upgrade in future, p67 boards you won't be able to do this.
16GB is a overkill, 8GB is plenty and cheap
The hx-850w is 80 plus silver and not 100% modular. Silverstone 850w gold and corsair ax-850 both are 80 plus gold (more efficient) and 100% modular, corsair is $50 more expensive but the cables are fully black which looks nicer
$199 for the WD black, because of the floods last year in thailand prices of hard drives have skyrocketed, get a Seagate barracuda 1tb for $109 best value for money right now
Standard corsair force series 3 120gb will do the job
Bluray optical drive are affordable right now, but if don't really need bluray, get a samsung optical for $22
If your going to spend that money on a case I would get a coolermaster cosmos 2 over 800d for the same price, it's bigger, nicer looking and supports xl-atx mobo's, still kinda of a overkill though. You can get lots of great case's for under that price range but it's up to personal preference in what you choose
You should get aftermarket cooling since your spending $1500-2000 and using a k chip, if want the best 'noob' water cooling corsair h100 is the best but it's not that good for $165. Most air cooler's for under $100 will do the job
If you need a OS, oem win 7 64-bit for around $100
Edited once, 14/1/12 - 1:43pm.
Posted on Saturday, 14th January 2012