Looking for advice once again, I have been searching the website and have found three cards, but unsure which one would be the best for performance, or is there any other 4gb card you can recommend which is better than these with a max price up to £280 Thanks for any help 

http://www.overclockers.co.uk/showproduct.php?prodid=GX-239-MS
http://www.overclockers.co.uk/showproduct.php?prodid=GX-212-MS&groupid=701&catid=1914
http://www.overclockers.co.uk/showproduct.php?prodid=GX-120-GI&groupid=701&catid=1914


http://www.overclockers.co.uk/showproduct.php?prodid=GX-239-MS
http://www.overclockers.co.uk/showproduct.php?prodid=GX-212-MS&groupid=701&catid=1914
http://www.overclockers.co.uk/showproduct.php?prodid=GX-120-GI&groupid=701&catid=1914