So I have a budget of 230 and I'm trying to pick a graphics card for my computer I also need a new quad core fm2 processor and a new case. I'm thinking the Athlon x4 860k, so that would leave me with about 170-180 for the case and graphics card. I'm not sure weather to go for the 7870 or the gtx 750 ti. After looking at game debate I'm confident in the 7870 but not entirely sure it's the best choice. I have seen a manufactured refurb gtx 960 for 120, but I'm still not sure on what to get. I will be looking for gaming. And as I'm not a "hardcore" gamer but like to play current titles such as advanced warfare and FIFA 15 (which has a 4 core minimum, and is the main reason I'm upgrading my cpu as it stutters without those extra cores) so I'd be able to play happily at 720p but Obviously 1080p wouldn't hurt haha what would you guys suggest? 
current build
AMD A6-6400k (overclocked 4.3 ghz)
Asus a88xm-a
4gb Kingston ram
320gb HDD
And the cheapest case I could find and its an absolute piece of crap that needs replacing. Very bad error in judgement haha.
Also would it be worth my time to overclock the 860k? For gaming and all purpose performance?

current build
AMD A6-6400k (overclocked 4.3 ghz)
Asus a88xm-a
4gb Kingston ram
320gb HDD
And the cheapest case I could find and its an absolute piece of crap that needs replacing. Very bad error in judgement haha.
Also would it be worth my time to overclock the 860k? For gaming and all purpose performance?