I've got a Mondeo ST TDCi, its nippy enough and with Bluefin, you have a fast car. Its well kitted out, it'll be under your budget. Only thing I'd say is you get around 40-43mpg out of it which is not the best, but still better than petrol.

Just make sure you get one with Xenons, Sat Nav and the Bluetooth phone option, they tend to hold money a bit better aswell.