Welcome to the forum, As Micky says go for either the 1.6 TDCI or the 2.0 TDCI, I own the 1.6 TDCI Zetec and have covered about 2200 miles in it since I got it in September, only problems I have are war and tear, if your going for a Zetec it might be good to look around at finding one with the optional 17 inch alloys, as I really think it makes the car stand out, I never knew about it until I had purchased the car that this was a option.
Hi , a very warm welcome to You. Av got the 2.0 tdci , cant begin to tell you how fantastic these are in performance and economy. Covered 10,000 miles , not a spot of bother . Good luck with your choice