This seems like a fine pick. Not sure if you will get consistant 30 FPS. However for the most part it's a nice rig. But should you want to save a few hundred more dollars and add it to your budget. You can easily build a $1,000. Core i5 4670K system with a Hero board and some nice extras. The key is to look at things like open box specials on New Egg, walk into a local Micro Center and even look on Ebay for new to slightly used items. Just built this:
i5 4670K - $199.95- ebay new
Raidmax Aelous Case- $59.99 ebay-sold by new egg
PSU-Corsair 750W Gold Rated-$119.99 (you can easily knock this down to something in the $70 range)
ASUS MAXIMUS VI HERO LGA 1150 Intel Z87 ATX Intel Motherboard - 149.99 New Egg open box online. Came with everything and was actually NEW!
Mushkin Redline 8gb (2X4) DDR3 1600 - $89.99 (New Egg)
Fans and Peripherals- $63.00 (including optical)
Corsair H60 Closed circuit liquid cooling for CPU- $50.00 on ebay new
2 Asus 8970 graphics cards used, but fully functioning for 2 months now - $275.00
Build cost :1007.91 excluding OS
If you get a cheaper PSU and a single Graphics card for around 150 (the R9 270 is going for 150 new on ebay just be patient) your total build cost could be in the $900 marker.
I say screw wifi unless you MUST have it. With a bad router it will kill your gaming with latency. And as far as an OS goes. Theres no need for windows 8 on a desktop. Windows 7 Pro 64 bit will serve you just as well. Ebay that OS too and you can get it for 50 bucks new.
Not saying you need to build what I built, but for a little more, this system will out bench yours anyday of the week. AMD's cpu's have not been keeping up with intel lately, and if you really want to future proof your build, a Haswell based setup might serve you better in the long run.
All the Best.