It is like choosing turd and poo, both are exactly the same i'd go with the 5200 for support of BF2 on low graphics depends, as their isn't a whole lotta difference between the two literally... You could buy either and it wouldn't matter..
I'd go the nvidia option, because it is DX 9 built unlike the 9250 which is only DX8.1 which is a big problem now....
but i found this which will give a bit more of a performance boost it is a fx5500 which has a bit more on a 5200 a tad more expensive though
http://www.newegg.com/Product/Produc...82E16814143032
Or even better yet a..... 5700LE which is possible overclockable here it is for under 100
http://www.newegg.com/Product/Produc...82E16814139166
So check em out_ id go 5700 LE will be supported more in the future!