I'm sure you know what this is so I won't bore you too much with the details. The 8800GT, 9800GT and GTS250 are essentially the same card so look for the cheapest.
This is the best deal I could find on any of that range of cards, it has a good cooler and a HDMI connection as standard. If Nvidia is your bag and you are looking to spend under £100 I am pretty sure this is the best around. Also SLI compatible for those who like to have an easy upgrade path in the future.