Antec has come out with several series of power supplies and they have changed psu manufacturers. You might be better off with an Antec Earthwatts 500 watt power supply. It is more efficient than the Neopower version. With two +12 volt rails rated at 17 amps each it can handle just about any single high end video card.
Here's a link to a technical review over at JonnyGuru.com:http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=35
If you have a little extra money it is currently available at newegg.com for $79.99 and shipping is free:http://www.newegg.com/Product/Product.aspx?Item=N82E16817371007