When it comes down to what would work what wouldnt, its down to what would work well. Your about to throw money into the game so,
ATI as i said is good value for moneyz, here is a couple boss:
http://www.xoticpc.com/havoc-stage-p-6623.html
http://www.newegg.com/Product/Product.aspx?Item=N82E16883227546
Depends what ur budget is.
Windows 8 yes is a must to play BF4 even moar epicly/. This is your upgrade for the next few years so, Not here to fanboy with AMD ^ print it on game for reason very small amount of problems with them. Some people might say otherwise however track record Nvidia proves itself not good with frostbite. I have use both for sometime due to my interests in life^ also been advising ppl on frostbite builds for ages
added you w origin boss, there is a time difference. My internet also sucks here so bare w me, any upgrade is a good upgrade past what ur gaming on. How long tho do u want till u stick moar money in? 1 yr ? Battlefront will push gaming builds, 2 years? when we hit BFE cough Battlefield Extintion Dinosaur game? (we all know its gona come so lets just plan on it) or 3 years. Call of Duty at this point decides it needs Frostbite and buys license and remakes CoD 1 on Frostbite 5 while we are play BF5?
food for thought, sorry long response time head has been um. Ingrossed ? found something, chased it , was fun
Here is some good google lines
CARD NAME + BF4 BENCHMARKS
CARD NAME + BF4 GAMEPLAY 1080p - This will pull some kid with fraps (worlds worst recording software) on youtube
CARD NAME + BF4 wont work