570 is $250 NZD
6950 is $270 NZD
EDIT: found a Galaxy GTX 480 for $300NZD, is that better and worth it for extra money?
Radeon 7870 http://www.newegg.com/Product/Product.aspx?Item=N82E16814202010
292.42 NZD /$246
faster than the gtx 570 and the 6950, takes less power and slightly cheaper!