what about an nvidia card?
nothing wrong with an nvidia, there are just alot of new cards from ATI with new technologies about at the moment..
ati has some very compelling cards at some amazing price points. i assume you mean $, not £ or euro.
for about $130 on newegg you can get a 5750 http://www.newegg.com/Product/Product.aspx?Item=N82E16814121351
will give you about 60+ fps at 1280*1024 across most games and is cool running and low on power requirements.
the 250 from nvidia is older and hotter which also lack in features.