these are well priced cards around your price range..
those are pounds, not dollars.. i don't have pound key on my keyboard. some of the brands i've chosen i'm not too familiar with since they're not available in canada/USA; but i'm sure they're fine.
Now im a bit spoilt for choice what choose I don't like ATI because I've had bad experiences and bit scared of going with Geforce graphics cards that are not Nvidia