For the price of the 8500 there, you can pick up a much better one at newegg.com

[link=http://www.rcuniverse.com/forum/m_6300298/anchors_6300298/mpage_1/key_Nitroplanes%252CTucano/anchor/tm.htm#6300298]Click me![/link]

However with the nvidia card, the second number e.g. x500 versus x600 determines the chipset used.

The higher the better.

But I would strongly suggest you spend a little more and get say an 8800GT

[link=http://www.newegg.com/Product/Product.aspx?Item=N82E16814125089]8800GT[/link]

Which works out to only $159.00 with rebate for great performance and DX10 compatibility.