C3 1.6 HDI recommended?

Hello, I’m looking for a C3. It should be a diesel with some power. I thought the 1.6 would be good. I looked around for Polos before, but they are too expensive as a 5-door with TDI engine. I found a C3 Comfort and a VTR. Does the Comfort have a softer suspension? Is there something typical about C3 that you should pay attention to when buying. Oh yes, what else, what should be changed the Zahbelt? Many thanks Shivago