Cars Q&A

I drive around 1500-1800 kms every month, 70% drive would be in Delhi/NCR areas with almost 40% highway driving. I have shortlisted 3 cars, namely, Verna-crdi-Diesel(Rs. 9.00 lacs), Vento-Diesel (Rs. 9.25 lacs)and Sx4-CNG (company fitted)Version (Rs. 7.70 lacs). Would request you to advice the best option amongst the 3 shortlisted cars taking into account, overall cost of car, overall maintenance, fuel efficiency, etc. Plan to buy immediately, hence urgect response w'ud be appreciated.