Which Video card would be the best?

I'm looking for a new video card but i don't know if i should buy



Asus 8800GS http://cgi.ebay.co.uk/Asus-8800GS-8800-GS-/220790193028?pt=UK_Computing_Computer_Components_Graphics_Video_TV_Cards_TW&hash=item33681efb84







ATI RADEON HD 3850 512MB http://cgi.ebay.co.uk/ATI-RADEON-HD-3850-512MB-PCI-EXPRESS-GREAT-CONDITION-/330569812934?pt=UK_Computing_Computer_Components_Graphics_Video_TV_Cards_TW&hash=item4cf77f0bc6





I want to get around 60-80 fps in left 4 dead 2 with max settings but i don't know which will be the best i mostly want to play source games at max setting Thank you for your help.|||new video card huh?

those are like 4 to 6 year old cards, but 8800 is faster