No need to buy windows man, there are always "alternatives" like linux and other related things that are free.
Do you really need 16gbs of RAM for gaming?
You would need a PCI-e wireless card if you wanted to game on it, a USB adapter wouldn't really cut it exactly.
http://pcpartpicker.com/p/qM7PWZ current state still looking for a video card thats not going to kill the budget.
I've got a hard on for that case any thing else can go.
Do not give up the SSD, what ever you do. And get a modern GPU, the r9 280x will suite you. Granted it is old, but still packs a punch.
A 260x is about 100 dollars
an R9 280 is about $150. go for the 280 if possible.
Also, forget the SSD lol, you can always get it at a later date.
And you should try to go for the 8320E if possible, bit more power efficient and overclocking friendly I believe.
http://pcpartpicker.com/p/MqnQ23 It's looking done so far I'll just buy everything else later date.
You might as well save money and get a 280 over a 280x, the x isn't going to be all that much faster.
finished list http://pcpartpicker.com/p/sz4DdC still a bit pricey.
http://pcpartpicker.com/p/XZhMYJ looking good. Only thing left is to keep a monitor in mind I know Best Buy is cancer would't spend my money their and trust fir a good one. I don't know the specs very well for best resolution recommend me something for around $99 and I'm pretty much set.
get a 1080p off craigslist, trust me it's worth the money you save, they go for like 50 bucks.
I would take a current gen i3 and a cheap h-chipset board over anything AMD is offering. Take the money from the CPU and put it where it really matters. The GPU.