You should go for Honda City 2007-08. I think you will get a genuine, less driven, Islamabad registered car in 11 lac Rupees.
Swift is also a good option, the only thing which it lacks is trunk space when CNG is installed. I have also heard that Swift is not that good on CNG. So if you want to drive on petrol, then Swift is a good option, but if you wana drive your car on CNG, then go for City 07-08.