Hi Dezel x2,
I am agree with tilvin!
I recommend you Nissan CEFIRO A33 without any hesitation if you are not thinking much on fuel.
As you mentioned you are traveling to upcountry, so the fuel will be much better than in Colombo as it's a outstation drive.(Around 7-8kmpl).
Buy it does like 4-5kmpl in high traffic.
And the car is very comfortable and very very eye catching and Prestigious.
As I am using a Nissan CEFIRO a33 2L year 2000, WITHOUT any error(still),I can recommend you Nissan CEFIRO a33.
If you are buying check the car, mostly CEFIRO has Gear changing errors and engine missing as Common errors.So check the car before buying.
All the best and be a CEFIRO owner!