Possible graphics card upgrade for a Dell Dimension 9200

[spiki]

My nephew's Dimension is getting a bit long in the tooth and he has asked me for some advice on a cheap upgrade for his system.

He's mainly playing CoD 4&5, the Orange Box & L4D on a 19" inch monitor. Games look just alright but not much eye candy.

Not 100% sure on his specs but something like this:

C2D E6300
ATI X1300 - not completely sure if its this or an X300
2 GB DDR2 Ram
250Gb HDD
375W Dell PSU
Vista HP

He's saved up about £70 to buy a new graphics card - what would you recommend given his set up?

Thanks for your help.

 

[spiki]

Thanks for all the replies much appreciated - will pass this onto his lordship and bust the piggybank open soon.