Second Opinions On Gaming PC

Everything looks good. Your link to the memory is broken, though.

You only need 8GB of RAM for gaming, and if you are spending $125 for 8GB, you are overpaying.

http://www.amazon.com/TP-LINK-TL-WN951N-Wireless-Advanced-Adapter/dp/B0034CL2ZI/ref=sr_1_21?ie=UTF8&qid=1365310408&sr=8-21&keywords=wifi+adapter

http://www.amazon.com/TP-LINK-TL-WN951N-Wireless-Advanced-Adapter/dp/B0034CL2ZI/ref=sr_1_21?ie=UTF8&qid=1365310408&sr=8-21&keywords=wifi+adapter

Better and cheaper wireless card and better deal on monitor you want.

Also, better video card from exact same manufacturer for cheaper.

http://www.amazon.com/HIS-Mini-DiplayPort-Express-Graphics-H787Q2G2M/dp/B007HYIRES/ref=sr_1_4?s=electronics&ie=UTF8&qid=1365310608&sr=1-4&keywords=7870

http://www.bit-tech.net/hardware/2012/05/10/nvidia-geforce-gtx-670-2gb-review/4

Look at that chart. With an HD 7850, at 1920x1080, maximum settings, those guys got an average rate of 49 fps and a minimum of 44 fps. If you want 60 fps and the GPU has to be from AMD, your options are:

AMD Radeon HD 6990 4GB
AMD Radeon HD 7970 3GB
AMD Radeon HD 7950 3GB
AMD Radeon HD 7870 2GB

do not bump you own post.

PCPartPicker part list: http://pcpartpicker.com/p/P0hw
Price breakdown by merchant: http://pcpartpicker.com/p/P0hw/by_merchant/
Benchmarks: http://pcpartpicker.com/p/P0hw/benchmarks/

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($189.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler ($19.99 @ Newegg)
Motherboard: Biostar TZ77A ATX LGA1155 Motherboard ($89.99 @ Amazon)
Memory: Patriot Viper 3 8GB (2 x 4GB) DDR3-1866 Memory ($42.98 @ Amazon)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($74.99 @ Newegg)
Video Card: Gigabyte GeForce GTX 670 2GB Video Card ($363.98 @ Newegg)
Wireless Network Adapter: Intel 62205ANHMWDTX1 802.11a/b/g/n PCI-Express x1 Wi-Fi Adapter ($33.99 @ Amazon)
Case: Cooler Master Elite 335 Upgraded ATX Mid Tower Case ($36.85 @ NCIX US)
Case Fan: Cooler Master R4-L4S-10AB-GP 60.9 CFM 140mm Fan ($5.75 @ NCIX US)
Case Fan: Cooler Master R4-L4S-10AB-GP 60.9 CFM 140mm Fan ($5.75 @ NCIX US)
Case Fan: Cooler Master R4-L4S-10AB-GP 60.9 CFM 140mm Fan ($5.75 @ NCIX US)
Power Supply: Corsair Enthusiast 650W 80 PLUS Certified ATX12V / EPS12V Power Supply ($59.99 @ Newegg)
Optical Drive: LG GH24NS95 DVD/CD Writer ($17.99 @ Newegg)
Monitor: Asus VS278Q-P 27.0" Monitor ($294.99 @ Amazon)
Total: $1235.98
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-04-07 03:36 EDT-0400)

It's easier to have an antenna that you can freely move around so you don't have to go through your computer case to get a signal, it makes a difference. Are there better wifi cards, possibly for the price but this is what I found in stock at newegg which was dual band. And after having a usb wifi device that kept overheating that caused internet drops I rather avoid USB, and this meets my criteria on that. And if you have a smartphone you can download something that tells you your wifi signal strength so you can experiment and find the best location for the antenna.

Link to case
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119244

I included enough fans for the 2 sides and front intake. Used quiet 140mm fans which provide what should be more than adequate airflow.