i love lamp :
Hello, what gpu should i go for
gtx 760 vs. r9 280 vs. gtx 670 or wait for 900 series
this os for games like bf4 arma3 etc
and what processor
i5 4670k vs. fx8350 vs. or wait till z97 platform
Thanks.
I personally lean towards NVIDIA stuff, which usually costs a little more, not by much though.
Between the choices you listed
GPU wise: I would say the GTX 760 is a better bet, its in the sweet spot of GPU's and its fast, also very overclock friendly if you ever want to get into that. (Also I think you mean the GTX 800 series, I wouldn't wait for those, it will be a while yet).
CPU wise: I would go with the Core i5 4670K, much better performance than the FX8350 in pretty much anything, even more so when talking about gaming.
PS, to give you a better answer;
1) Whats your budget for this build?
2) Do you already have a Operating System ready? (If so, which one)
3) Whats the size and/or resolution of your computer monitor that you will use.