i drive an N16 (nissan sentra 02 body onwards) and lets just the back is a lot cramped than other cars like the civic (SIR body) or the altis. i would look at other cars before going to the sentra since you're planning to use it as a family car.

imo nissans depreciate fast kaya its not good to buy new(nagsisi kami bought the exalta new) or nearly new (like the one ur looking at). if you're going to buy a sentra then it must be atleast 2 yrs old para mababa na talaga yun price.

and yeah cefiro to a bareass 1.3 sentra is big downgrade.