The spoilt of choice…300c Touring, Magnum or yet Nitro?…and what engine?

Hi Because of family growth I have to switch to a car with large trunk and roof racks.Kids , dog and suitcases should fit in already.An Ami should be there already … My favourites : Chrysler 300C Touring , Dodge Magnum , Dodge Nitro or Dodge Yourney … I tend to 300 C Touring and to Magnum , but what motorization ? My questions : What positive and negative experiences have you made with the engines 2.7 – 3.5 – 5.7 and 3.0 CRD (acceleration , Consumption,etc.) and which would you recommend? Do the gasoline engines have a gas system well or can there be problems (gas system recommended) ? Is there a difference between 300C Touring and Magnum (except the optics) ? 300C Touring or Magnum ? I am grateful for every tip and report…