Imho the graphics card story is a bit tricky at the moment. AMD came up with their Mantle thingy, which could make AMD the preferred camp for any game that supports Mantle. Questions at this point are "is Mantle really that great?" and whether or not developers will support it in future games.
AMD is claiming a 45% improvement in Battlefield 4. Hard to really verify anything at this point, but promising enough to not dismiss hastily.
Apart from that, have a look at the 200,- to 250,- segment. Think you'd be pretty happy with a card like that.